This is the 4.4.109 stable release

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Merge 4.4.109 into android-4.4

Changes in 4.4.109
	ACPI: APEI / ERST: Fix missing error handling in erst_reader()
	crypto: mcryptd - protect the per-CPU queue with a lock
	mfd: cros ec: spi: Don't send first message too soon
	mfd: twl4030-audio: Fix sibling-node lookup
	mfd: twl6040: Fix child-node lookup
	ALSA: rawmidi: Avoid racy info ioctl via ctl device
	ALSA: usb-audio: Fix the missing ctl name suffix at parsing SU
	PCI / PM: Force devices to D0 in pci_pm_thaw_noirq()
	parisc: Hide Diva-built-in serial aux and graphics card
	spi: xilinx: Detect stall with Unknown commands
	KVM: X86: Fix load RFLAGS w/o the fixed bit
	kvm: x86: fix RSM when PCID is non-zero
	powerpc/perf: Dereference BHRB entries safely
	net: mvneta: clear interface link status on port disable
	tracing: Remove extra zeroing out of the ring buffer page
	tracing: Fix possible double free on failure of allocating trace buffer
	tracing: Fix crash when it fails to alloc ring buffer
	ring-buffer: Mask out the info bits when returning buffer page length
	iw_cxgb4: Only validate the MSN for successful completions
	ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure
	ASoC: twl4030: fix child-node lookup
	ALSA: hda: Drop useless WARN_ON()
	ALSA: hda - fix headset mic detection issue on a Dell machine
	x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly()
	x86/mm: Remove flush_tlb() and flush_tlb_current_task()
	x86/mm: Make flush_tlb_mm_range() more predictable
	x86/mm: Reimplement flush_tlb_page() using flush_tlb_mm_range()
	x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code
	x86/mm: Disable PCID on 32-bit kernels
	x86/mm: Add the 'nopcid' boot option to turn off PCID
	x86/mm: Enable CR4.PCIDE on supported systems
	x86/mm/64: Fix reboot interaction with CR4.PCIDE
	kbuild: add '-fno-stack-check' to kernel build options
	ipv4: igmp: guard against silly MTU values
	ipv6: mcast: better catch silly mtu values
	net: igmp: Use correct source address on IGMPv3 reports
	netlink: Add netns check on taps
	net: qmi_wwan: add Sierra EM7565 1199:9091
	net: reevalulate autoflowlabel setting after sysctl setting
	tcp md5sig: Use skb's saddr when replying to an incoming segment
	tg3: Fix rx hang on MTU change with 5717/5719
	net: ipv4: fix for a race condition in raw_sendmsg
	net: mvmdio: disable/unprepare clocks in EPROBE_DEFER case
	sctp: Replace use of sockets_allocated with specified macro.
	ipv4: Fix use-after-free when flushing FIB tables
	net: bridge: fix early call to br_stp_change_bridge_id and plug newlink leaks
	net: Fix double free and memory corruption in get_net_ns_by_id()
	net: phy: micrel: ksz9031: reconfigure autoneg after phy autoneg workaround
	sock: free skb in skb_complete_tx_timestamp on error
	usbip: fix usbip bind writing random string after command in match_busid
	usbip: stub: stop printing kernel pointer addresses in messages
	usbip: vhci: stop printing kernel pointer addresses in messages
	USB: serial: ftdi_sio: add id for Airbus DS P8GR
	USB: serial: qcserial: add Sierra Wireless EM7565
	USB: serial: option: add support for Telit ME910 PID 0x1101
	USB: serial: option: adding support for YUGA CLM920-NC5
	usb: Add device quirk for Logitech HD Pro Webcam C925e
	usb: add RESET_RESUME for ELSA MicroLink 56K
	USB: Fix off by one in type-specific length check of BOS SSP capability
	usb: xhci: Add XHCI_TRUST_TX_LENGTH for Renesas uPD720201
	nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()
	x86/smpboot: Remove stale TLB flush invocations
	n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD)
	mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even on UP
	Linux 4.4.109

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Documentation/kernel-parameters.txt

@@ -2561,6 +2561,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	nopat		[X86] Disable PAT (page attribute table extension of
 			pagetables) support.
 
+	nopcid		[X86-64] Disable the PCID cpu feature.
+
 	norandmaps	Don't use address space randomization.  Equivalent to
 			echo 0 > /proc/sys/kernel/randomize_va_space
 

Makefile

@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 4
-SUBLEVEL = 108
+SUBLEVEL = 109
 EXTRAVERSION =
 NAME = Blurry Fish Butt
 
@@ -804,6 +804,9 @@ KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 # disable invalid "can't wrap" optimizations for signed / pointers
 KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
 
+# Make sure -fstack-check isn't enabled (like gentoo apparently did)
+KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
+
 # conserve stack if available
 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 

arch/powerpc/perf/core-book3s.c

@@ -401,8 +401,12 @@ static __u64 power_pmu_bhrb_to(u64 addr)
 	int ret;
 	__u64 target;
 
-	if (is_kernel_addr(addr))
+	if (is_kernel_addr(addr)) {
-		return branch_target((unsigned int *)addr);
+		if (probe_kernel_read(&instr, (void *)addr, sizeof(instr)))
+			return 0;
+
+		return branch_target(&instr);
+	}
 
 	/* Userspace: need copy instruction here then translate it */
 	pagefault_disable();

arch/x86/Kconfig

@@ -43,7 +43,7 @@ config X86
 	select ARCH_USE_CMPXCHG_LOCKREF		if X86_64
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
-	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP
+	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
 	select ARCH_WANTS_DYNAMIC_TASK_STRUCT
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_IPC_PARSE_VERSION	if X86_32

arch/x86/include/asm/disabled-features.h

@@ -21,11 +21,13 @@
 # define DISABLE_K6_MTRR	(1<<(X86_FEATURE_K6_MTRR & 31))
 # define DISABLE_CYRIX_ARR	(1<<(X86_FEATURE_CYRIX_ARR & 31))
 # define DISABLE_CENTAUR_MCR	(1<<(X86_FEATURE_CENTAUR_MCR & 31))
+# define DISABLE_PCID		0
 #else
 # define DISABLE_VME		0
 # define DISABLE_K6_MTRR	0
 # define DISABLE_CYRIX_ARR	0
 # define DISABLE_CENTAUR_MCR	0
+# define DISABLE_PCID		(1<<(X86_FEATURE_PCID & 31))
 #endif /* CONFIG_X86_64 */
 
 /*
@@ -35,7 +37,7 @@
 #define DISABLED_MASK1	0
 #define DISABLED_MASK2	0
 #define DISABLED_MASK3	(DISABLE_CYRIX_ARR|DISABLE_CENTAUR_MCR|DISABLE_K6_MTRR)
-#define DISABLED_MASK4	0
+#define DISABLED_MASK4	(DISABLE_PCID)
 #define DISABLED_MASK5	0
 #define DISABLED_MASK6	0
 #define DISABLED_MASK7	0

arch/x86/include/asm/hardirq.h

@@ -22,8 +22,8 @@ typedef struct {
 #ifdef CONFIG_SMP
 	unsigned int irq_resched_count;
 	unsigned int irq_call_count;
-	unsigned int irq_tlb_count;
 #endif
+	unsigned int irq_tlb_count;
 #ifdef CONFIG_X86_THERMAL_VECTOR
 	unsigned int irq_thermal_count;
 #endif

arch/x86/include/asm/mmu.h

@@ -24,12 +24,6 @@ typedef struct {
 	atomic_t perf_rdpmc_allowed;	/* nonzero if rdpmc is allowed */
 } mm_context_t;
 
-#ifdef CONFIG_SMP
 void leave_mm(int cpu);
-#else
-static inline void leave_mm(int cpu)
-{
-}
-#endif
 
 #endif /* _ASM_X86_MMU_H */

arch/x86/include/asm/mmu_context.h

@@ -98,10 +98,8 @@ static inline void load_mm_ldt(struct mm_struct *mm)
 
 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 {
-#ifdef CONFIG_SMP
 	if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK)
 		this_cpu_write(cpu_tlbstate.state, TLBSTATE_LAZY);
-#endif
 }
 
 extern void switch_mm(struct mm_struct *prev, struct mm_struct *next,

arch/x86/include/asm/tlbflush.h

@@ -6,6 +6,7 @@
 
 #include <asm/processor.h>
 #include <asm/special_insns.h>
+#include <asm/smp.h>
 
 static inline void __invpcid(unsigned long pcid, unsigned long addr,
 			     unsigned long type)
@@ -64,10 +65,8 @@ static inline void invpcid_flush_all_nonglobals(void)
 #endif
 
 struct tlb_state {
-#ifdef CONFIG_SMP
 	struct mm_struct *active_mm;
 	int state;
-#endif
 
 	/*
 	 * Access to this CR4 shadow and to H/W CR4 is protected by
@@ -191,6 +190,14 @@ static inline void __flush_tlb_all(void)
 		__flush_tlb_global();
 	else
 		__flush_tlb();
+
+	/*
+	 * Note: if we somehow had PCID but not PGE, then this wouldn't work --
+	 * we'd end up flushing kernel translations for the current ASID but
+	 * we might fail to flush kernel translations for other cached ASIDs.
+	 *
+	 * To avoid this issue, we force PCID off if PGE is off.
+	 */
 }
 
 static inline void __flush_tlb_one(unsigned long addr)
@@ -204,7 +211,6 @@ static inline void __flush_tlb_one(unsigned long addr)
 /*
  * TLB flushing:
  *
- *  - flush_tlb() flushes the current mm struct TLBs
  *  - flush_tlb_all() flushes all processes TLBs
  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  *  - flush_tlb_page(vma, vmaddr) flushes one page
@@ -216,84 +222,6 @@ static inline void __flush_tlb_one(unsigned long addr)
  * and page-granular flushes are available only on i486 and up.
  */
 
-#ifndef CONFIG_SMP
-
-/* "_up" is for UniProcessor.
- *
- * This is a helper for other header functions.  *Not* intended to be called
- * directly.  All global TLB flushes need to either call this, or to bump the
- * vm statistics themselves.
- */
-static inline void __flush_tlb_up(void)
-{
-	count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
-	__flush_tlb();
-}
-
-static inline void flush_tlb_all(void)
-{
-	count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
-	__flush_tlb_all();
-}
-
-static inline void flush_tlb(void)
-{
-	__flush_tlb_up();
-}
-
-static inline void local_flush_tlb(void)
-{
-	__flush_tlb_up();
-}
-
-static inline void flush_tlb_mm(struct mm_struct *mm)
-{
-	if (mm == current->active_mm)
-		__flush_tlb_up();
-}
-
-static inline void flush_tlb_page(struct vm_area_struct *vma,
-				  unsigned long addr)
-{
-	if (vma->vm_mm == current->active_mm)
-		__flush_tlb_one(addr);
-}
-
-static inline void flush_tlb_range(struct vm_area_struct *vma,
-				   unsigned long start, unsigned long end)
-{
-	if (vma->vm_mm == current->active_mm)
-		__flush_tlb_up();
-}
-
-static inline void flush_tlb_mm_range(struct mm_struct *mm,
-	   unsigned long start, unsigned long end, unsigned long vmflag)
-{
-	if (mm == current->active_mm)
-		__flush_tlb_up();
-}
-
-static inline void native_flush_tlb_others(const struct cpumask *cpumask,
-					   struct mm_struct *mm,
-					   unsigned long start,
-					   unsigned long end)
-{
-}
-
-static inline void reset_lazy_tlbstate(void)
-{
-}
-
-static inline void flush_tlb_kernel_range(unsigned long start,
-					  unsigned long end)
-{
-	flush_tlb_all();
-}
-
-#else  /* SMP */
-
-#include <asm/smp.h>
-
 #define local_flush_tlb() __flush_tlb()
 
 #define flush_tlb_mm(mm)	flush_tlb_mm_range(mm, 0UL, TLB_FLUSH_ALL, 0UL)
@@ -302,13 +230,14 @@ static inline void flush_tlb_kernel_range(unsigned long start,
 		flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
 
 extern void flush_tlb_all(void);
-extern void flush_tlb_current_task(void);
-extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
 extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
 				unsigned long end, unsigned long vmflag);
 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
 
-#define flush_tlb()	flush_tlb_current_task()
+static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long a)
+{
+	flush_tlb_mm_range(vma->vm_mm, a, a + PAGE_SIZE, VM_NONE);
+}
 
 void native_flush_tlb_others(const struct cpumask *cpumask,
 				struct mm_struct *mm,
@@ -323,8 +252,6 @@ static inline void reset_lazy_tlbstate(void)
 	this_cpu_write(cpu_tlbstate.active_mm, &init_mm);
 }
 
-#endif	/* SMP */
-
 #ifndef CONFIG_PARAVIRT
 #define flush_tlb_others(mask, mm, start, end)	\
 	native_flush_tlb_others(mask, mm, start, end)

arch/x86/kernel/cpu/bugs.c

@@ -19,6 +19,14 @@
 
 void __init check_bugs(void)
 {
+#ifdef CONFIG_X86_32
+	/*
+	 * Regardless of whether PCID is enumerated, the SDM says
+	 * that it can't be enabled in 32-bit mode.
+	 */
+	setup_clear_cpu_cap(X86_FEATURE_PCID);
+#endif
+
 	identify_boot_cpu();
 #ifndef CONFIG_SMP
 	pr_info("CPU: ");

arch/x86/kernel/cpu/common.c

@@ -162,6 +162,24 @@ static int __init x86_mpx_setup(char *s)
 }
 __setup("nompx", x86_mpx_setup);
 
+#ifdef CONFIG_X86_64
+static int __init x86_pcid_setup(char *s)
+{
+	/* require an exact match without trailing characters */
+	if (strlen(s))
+		return 0;
+
+	/* do not emit a message if the feature is not present */
+	if (!boot_cpu_has(X86_FEATURE_PCID))
+		return 1;
+
+	setup_clear_cpu_cap(X86_FEATURE_PCID);
+	pr_info("nopcid: PCID feature disabled\n");
+	return 1;
+}
+__setup("nopcid", x86_pcid_setup);
+#endif
+
 static int __init x86_noinvpcid_setup(char *s)
 {
 	/* noinvpcid doesn't accept parameters */
@@ -303,6 +321,25 @@ static __always_inline void setup_smap(struct cpuinfo_x86 *c)
 	}
 }
 
+static void setup_pcid(struct cpuinfo_x86 *c)
+{
+	if (cpu_has(c, X86_FEATURE_PCID)) {
+		if (cpu_has(c, X86_FEATURE_PGE)) {
+			cr4_set_bits(X86_CR4_PCIDE);
+		} else {
+			/*
+			 * flush_tlb_all(), as currently implemented, won't
+			 * work if PCID is on but PGE is not.  Since that
+			 * combination doesn't exist on real hardware, there's
+			 * no reason to try to fully support it, but it's
+			 * polite to avoid corrupting data if we're on
+			 * an improperly configured VM.
+			 */
+			clear_cpu_cap(c, X86_FEATURE_PCID);
+		}
+	}
+}
+
 /*
  * Some CPU features depend on higher CPUID levels, which may not always
  * be available due to CPUID level capping or broken virtualization
@@ -934,6 +971,9 @@ static void identify_cpu(struct cpuinfo_x86 *c)
 	setup_smep(c);
 	setup_smap(c);
 
+	/* Set up PCID */
+	setup_pcid(c);
+
 	/*
 	 * The vendor-specific functions might have changed features.
 	 * Now we do "generic changes."

arch/x86/kernel/reboot.c

@@ -93,6 +93,10 @@ void __noreturn machine_real_restart(unsigned int type)
 	load_cr3(initial_page_table);
 #else
 	write_cr3(real_mode_header->trampoline_pgd);
+
+	/* Exiting long mode will fail if CR4.PCIDE is set. */
+	if (static_cpu_has(X86_FEATURE_PCID))
+		cr4_clear_bits(X86_CR4_PCIDE);
 #endif
 
 	/* Jump to the identity-mapped low memory code */

arch/x86/kernel/smpboot.c

@@ -104,25 +104,16 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
 	spin_lock_irqsave(&rtc_lock, flags);
 	CMOS_WRITE(0xa, 0xf);
 	spin_unlock_irqrestore(&rtc_lock, flags);
-	local_flush_tlb();
-	pr_debug("1.\n");
 	*((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)) =
 							start_eip >> 4;
-	pr_debug("2.\n");
 	*((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) =
 							start_eip & 0xf;
-	pr_debug("3.\n");
 }
 
 static inline void smpboot_restore_warm_reset_vector(void)
 {
 	unsigned long flags;
 
-	/*
-	 * Install writable page 0 entry to set BIOS data area.
-	 */
-	local_flush_tlb();
-
 	/*
 	 * Paranoid:  Set warm reset code and vector here back
 	 * to default values.

arch/x86/kernel/vm86_32.c

@@ -187,7 +187,7 @@ static void mark_screen_rdonly(struct mm_struct *mm)
 	pte_unmap_unlock(pte, ptl);
 out:
 	up_write(&mm->mmap_sem);
-	flush_tlb();
+	flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, 0UL);
 }
 
 

arch/x86/kvm/emulate.c

@@ -2383,9 +2383,21 @@ static int rsm_load_seg_64(struct x86_emulate_ctxt *ctxt, u64 smbase, int n)
 }
 
 static int rsm_enter_protected_mode(struct x86_emulate_ctxt *ctxt,
-				     u64 cr0, u64 cr4)
+				    u64 cr0, u64 cr3, u64 cr4)
 {
 	int bad;
+	u64 pcid;
+
+	/* In order to later set CR4.PCIDE, CR3[11:0] must be zero.  */
+	pcid = 0;
+	if (cr4 & X86_CR4_PCIDE) {
+		pcid = cr3 & 0xfff;
+		cr3 &= ~0xfff;
+	}
+
+	bad = ctxt->ops->set_cr(ctxt, 3, cr3);
+	if (bad)
+		return X86EMUL_UNHANDLEABLE;
 
 	/*
 	 * First enable PAE, long mode needs it before CR0.PG = 1 is set.
@@ -2404,6 +2416,12 @@ static int rsm_enter_protected_mode(struct x86_emulate_ctxt *ctxt,
 		bad = ctxt->ops->set_cr(ctxt, 4, cr4);
 		if (bad)
 			return X86EMUL_UNHANDLEABLE;
+		if (pcid) {
+			bad = ctxt->ops->set_cr(ctxt, 3, cr3 | pcid);
+			if (bad)
+				return X86EMUL_UNHANDLEABLE;
+		}
+
 	}
 
 	return X86EMUL_CONTINUE;
@@ -2414,11 +2432,11 @@ static int rsm_load_state_32(struct x86_emulate_ctxt *ctxt, u64 smbase)
 	struct desc_struct desc;
 	struct desc_ptr dt;
 	u16 selector;
-	u32 val, cr0, cr4;
+	u32 val, cr0, cr3, cr4;
 	int i;
 
 	cr0 =                      GET_SMSTATE(u32, smbase, 0x7ffc);
-	ctxt->ops->set_cr(ctxt, 3, GET_SMSTATE(u32, smbase, 0x7ff8));
+	cr3 =                      GET_SMSTATE(u32, smbase, 0x7ff8);
 	ctxt->eflags =             GET_SMSTATE(u32, smbase, 0x7ff4) | X86_EFLAGS_FIXED;
 	ctxt->_eip =               GET_SMSTATE(u32, smbase, 0x7ff0);
 
@@ -2460,14 +2478,14 @@ static int rsm_load_state_32(struct x86_emulate_ctxt *ctxt, u64 smbase)
 
 	ctxt->ops->set_smbase(ctxt, GET_SMSTATE(u32, smbase, 0x7ef8));
 
-	return rsm_enter_protected_mode(ctxt, cr0, cr4);
+	return rsm_enter_protected_mode(ctxt, cr0, cr3, cr4);
 }
 
 static int rsm_load_state_64(struct x86_emulate_ctxt *ctxt, u64 smbase)
 {
 	struct desc_struct desc;
 	struct desc_ptr dt;
-	u64 val, cr0, cr4;
+	u64 val, cr0, cr3, cr4;
 	u32 base3;
 	u16 selector;
 	int i, r;
@@ -2484,7 +2502,7 @@ static int rsm_load_state_64(struct x86_emulate_ctxt *ctxt, u64 smbase)
 	ctxt->ops->set_dr(ctxt, 7, (val & DR7_VOLATILE) | DR7_FIXED_1);
 
 	cr0 =                       GET_SMSTATE(u64, smbase, 0x7f58);
-	ctxt->ops->set_cr(ctxt, 3,  GET_SMSTATE(u64, smbase, 0x7f50));
+	cr3 =                       GET_SMSTATE(u64, smbase, 0x7f50);
 	cr4 =                       GET_SMSTATE(u64, smbase, 0x7f48);
 	ctxt->ops->set_smbase(ctxt, GET_SMSTATE(u32, smbase, 0x7f00));
 	val =                       GET_SMSTATE(u64, smbase, 0x7ed0);
@@ -2512,7 +2530,7 @@ static int rsm_load_state_64(struct x86_emulate_ctxt *ctxt, u64 smbase)
 	dt.address =                GET_SMSTATE(u64, smbase, 0x7e68);
 	ctxt->ops->set_gdt(ctxt, &dt);
 
-	r = rsm_enter_protected_mode(ctxt, cr0, cr4);
+	r = rsm_enter_protected_mode(ctxt, cr0, cr3, cr4);
 	if (r != X86EMUL_CONTINUE)
 		return r;
 

arch/x86/kvm/x86.c

@@ -6941,7 +6941,7 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 #endif
 
 	kvm_rip_write(vcpu, regs->rip);
-	kvm_set_rflags(vcpu, regs->rflags);
+	kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED);
 
 	vcpu->arch.exception.pending = false;
 

arch/x86/mm/init.c

@@ -753,10 +753,8 @@ void __init zone_sizes_init(void)
 }
 
 DEFINE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate) = {
-#ifdef CONFIG_SMP
 	.active_mm = &init_mm,
 	.state = 0,
-#endif
 	.cr4 = ~0UL,	/* fail hard if we screw up cr4 shadow initialization */
 };
 EXPORT_SYMBOL_GPL(cpu_tlbstate);

arch/x86/mm/tlb.c

@@ -15,7 +15,7 @@
 #include <linux/debugfs.h>
 
 /*
- *	Smarter SMP flushing macros.
+ *	TLB flushing, formerly SMP-only
  *		c/o Linus Torvalds.
  *
  *	These mean you can really definitely utterly forget about
@@ -28,8 +28,6 @@
  *	Implement flush IPI by CALL_FUNCTION_VECTOR, Alex Shi
  */
 
-#ifdef CONFIG_SMP
-
 struct flush_tlb_info {
 	struct mm_struct *flush_mm;
 	unsigned long flush_start;
@@ -59,8 +57,6 @@ void leave_mm(int cpu)
 }
 EXPORT_SYMBOL_GPL(leave_mm);
 
-#endif /* CONFIG_SMP */
-
 void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 	       struct task_struct *tsk)
 {
@@ -77,10 +73,8 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,
 	unsigned cpu = smp_processor_id();
 
 	if (likely(prev != next)) {
-#ifdef CONFIG_SMP
 		this_cpu_write(cpu_tlbstate.state, TLBSTATE_OK);
 		this_cpu_write(cpu_tlbstate.active_mm, next);
-#endif
 		cpumask_set_cpu(cpu, mm_cpumask(next));
 
 		/*
@@ -137,9 +131,7 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,
 		if (unlikely(prev->context.ldt != next->context.ldt))
 			load_mm_ldt(next);
 #endif
-	}
+	} else {
-#ifdef CONFIG_SMP
-	  else {
 		this_cpu_write(cpu_tlbstate.state, TLBSTATE_OK);
 		BUG_ON(this_cpu_read(cpu_tlbstate.active_mm) != next);
 
@@ -166,11 +158,8 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,
 			load_mm_ldt(next);
 		}
 	}
-#endif
 }
 
-#ifdef CONFIG_SMP
-
 /*
  * The flush IPI assumes that a thread switch happens in this order:
  * [cpu0: the cpu that switches]
@@ -272,23 +261,6 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
 	smp_call_function_many(cpumask, flush_tlb_func, &info, 1);
 }
 
-void flush_tlb_current_task(void)
-{
-	struct mm_struct *mm = current->mm;
-
-	preempt_disable();
-
-	count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
-
-	/* This is an implicit full barrier that synchronizes with switch_mm. */
-	local_flush_tlb();
-
-	trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL);
-	if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids)
-		flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL);
-	preempt_enable();
-}
-
 /*
  * See Documentation/x86/tlb.txt for details.  We choose 33
  * because it is large enough to cover the vast majority (at
@@ -309,6 +281,12 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
 	unsigned long base_pages_to_flush = TLB_FLUSH_ALL;
 
 	preempt_disable();
+
+	if ((end != TLB_FLUSH_ALL) && !(vmflag & VM_HUGETLB))
+		base_pages_to_flush = (end - start) >> PAGE_SHIFT;
+	if (base_pages_to_flush > tlb_single_page_flush_ceiling)
+		base_pages_to_flush = TLB_FLUSH_ALL;
+
 	if (current->active_mm != mm) {
 		/* Synchronize with switch_mm. */
 		smp_mb();
@@ -325,15 +303,11 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
 		goto out;
 	}
 
-	if ((end != TLB_FLUSH_ALL) && !(vmflag & VM_HUGETLB))
-		base_pages_to_flush = (end - start) >> PAGE_SHIFT;
-
 	/*
 	 * Both branches below are implicit full barriers (MOV to CR or
 	 * INVLPG) that synchronize with switch_mm.
 	 */
-	if (base_pages_to_flush > tlb_single_page_flush_ceiling) {
+	if (base_pages_to_flush == TLB_FLUSH_ALL) {
-		base_pages_to_flush = TLB_FLUSH_ALL;
 		count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
 		local_flush_tlb();
 	} else {
@@ -354,33 +328,6 @@ out:
 	preempt_enable();
 }
 
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long start)
-{
-	struct mm_struct *mm = vma->vm_mm;
-
-	preempt_disable();
-
-	if (current->active_mm == mm) {
-		if (current->mm) {
-			/*
-			 * Implicit full barrier (INVLPG) that synchronizes
-			 * with switch_mm.
-			 */
-			__flush_tlb_one(start);
-		} else {
-			leave_mm(smp_processor_id());
-
-			/* Synchronize with switch_mm. */
-			smp_mb();
-		}
-	}
-
-	if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids)
-		flush_tlb_others(mm_cpumask(mm), mm, start, start + PAGE_SIZE);
-
-	preempt_enable();
-}
-
 static void do_flush_tlb_all(void *info)
 {
 	count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
@@ -465,5 +412,3 @@ static int __init create_tlb_single_page_flush_ceiling(void)
 	return 0;
 }
 late_initcall(create_tlb_single_page_flush_ceiling);
-
-#endif /* CONFIG_SMP */

arch/x86/xen/enlighten.c

@@ -433,6 +433,12 @@ static void __init xen_init_cpuid_mask(void)
 		~((1 << X86_FEATURE_MTRR) |  /* disable MTRR */
 		  (1 << X86_FEATURE_ACC));   /* thermal monitoring */
 
+	/*
+	 * Xen PV would need some work to support PCID: CR3 handling as well
+	 * as xen_flush_tlb_others() would need updating.
+	 */
+	cpuid_leaf1_ecx_mask &= ~(1 << (X86_FEATURE_PCID % 32));  /* disable PCID */
+
 	if (!xen_initial_domain())
 		cpuid_leaf1_edx_mask &=
 			~((1 << X86_FEATURE_ACPI));  /* disable ACPI */

crypto/mcryptd.c

@@ -80,6 +80,7 @@ static int mcryptd_init_queue(struct mcryptd_queue *queue,
 		pr_debug("cpu_queue #%d %p\n", cpu, queue->cpu_queue);
 		crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
 		INIT_WORK(&cpu_queue->work, mcryptd_queue_worker);
+		spin_lock_init(&cpu_queue->q_lock);
 	}
 	return 0;
 }
@@ -103,15 +104,16 @@ static int mcryptd_enqueue_request(struct mcryptd_queue *queue,
 	int cpu, err;
 	struct mcryptd_cpu_queue *cpu_queue;
 
-	cpu = get_cpu();
+	cpu_queue = raw_cpu_ptr(queue->cpu_queue);
-	cpu_queue = this_cpu_ptr(queue->cpu_queue);
+	spin_lock(&cpu_queue->q_lock);
-	rctx->tag.cpu = cpu;
+	cpu = smp_processor_id();
+	rctx->tag.cpu = smp_processor_id();
 
 	err = crypto_enqueue_request(&cpu_queue->queue, request);
 	pr_debug("enqueue request: cpu %d cpu_queue %p request %p\n",
 		 cpu, cpu_queue, request);
+	spin_unlock(&cpu_queue->q_lock);
 	queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
-	put_cpu();
 
 	return err;
 }
@@ -164,16 +166,11 @@ static void mcryptd_queue_worker(struct work_struct *work)
 	cpu_queue = container_of(work, struct mcryptd_cpu_queue, work);
 	i = 0;
 	while (i < MCRYPTD_BATCH || single_task_running()) {
-		/*
+
-		 * preempt_disable/enable is used to prevent
+		spin_lock_bh(&cpu_queue->q_lock);
-		 * being preempted by mcryptd_enqueue_request()
-		 */
-		local_bh_disable();
-		preempt_disable();
 		backlog = crypto_get_backlog(&cpu_queue->queue);
 		req = crypto_dequeue_request(&cpu_queue->queue);
-		preempt_enable();
+		spin_unlock_bh(&cpu_queue->q_lock);
-		local_bh_enable();
 
 		if (!req) {
 			mcryptd_opportunistic_flush();
@@ -188,7 +185,7 @@ static void mcryptd_queue_worker(struct work_struct *work)
 		++i;
 	}
 	if (cpu_queue->queue.qlen)
-		queue_work(kcrypto_wq, &cpu_queue->work);
+		queue_work_on(smp_processor_id(), kcrypto_wq, &cpu_queue->work);
 }
 
 void mcryptd_flusher(struct work_struct *__work)

drivers/acpi/apei/erst.c

@@ -1020,7 +1020,7 @@ skip:
 	/* The record may be cleared by others, try read next record */
 	if (len == -ENOENT)
 		goto skip;
-	else if (len < sizeof(*rcd)) {
+	else if (len < 0 || len < sizeof(*rcd)) {
 		rc = -EIO;
 		goto out;
 	}

drivers/infiniband/hw/cxgb4/cq.c

@@ -579,10 +579,10 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
 			ret = -EAGAIN;
 			goto skip_cqe;
 		}
-		if (unlikely((CQE_WRID_MSN(hw_cqe) != (wq->rq.msn)))) {
+		if (unlikely(!CQE_STATUS(hw_cqe) &&
+			     CQE_WRID_MSN(hw_cqe) != wq->rq.msn)) {
 			t4_set_wq_in_error(wq);
-			hw_cqe->header |= htonl(CQE_STATUS_V(T4_ERR_MSN));
+			hw_cqe->header |= cpu_to_be32(CQE_STATUS_V(T4_ERR_MSN));
-			goto proc_cqe;
 		}
 		goto proc_cqe;
 	}

drivers/mfd/cros_ec_spi.c

@@ -660,6 +660,7 @@ static int cros_ec_spi_probe(struct spi_device *spi)
 			   sizeof(struct ec_response_get_protocol_info);
 	ec_dev->dout_size = sizeof(struct ec_host_request);
 
+	ec_spi->last_transfer_ns = ktime_get_ns();
 
 	err = cros_ec_register(ec_dev);
 	if (err) {

drivers/mfd/twl4030-audio.c

@@ -159,13 +159,18 @@ unsigned int twl4030_audio_get_mclk(void)
 EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
 
 static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
-			      struct device_node *node)
+			      struct device_node *parent)
 {
+	struct device_node *node;
+
 	if (pdata && pdata->codec)
 		return true;
 
-	if (of_find_node_by_name(node, "codec"))
+	node = of_get_child_by_name(parent, "codec");
+	if (node) {
+		of_node_put(node);
 		return true;
+	}
 
 	return false;
 }

drivers/mfd/twl6040.c

@@ -97,12 +97,16 @@ static struct reg_sequence twl6040_patch[] = {
 };
 
 
-static bool twl6040_has_vibra(struct device_node *node)
+static bool twl6040_has_vibra(struct device_node *parent)
 {
-#ifdef CONFIG_OF
+	struct device_node *node;
-	if (of_find_node_by_name(node, "vibra"))
+
+	node = of_get_child_by_name(parent, "vibra");
+	if (node) {
+		of_node_put(node);
 		return true;
-#endif
+	}
+
 	return false;
 }
 

drivers/net/ethernet/broadcom/tg3.c

@@ -14228,7 +14228,9 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu)
 	/* Reset PHY, otherwise the read DMA engine will be in a mode that
 	 * breaks all requests to 256 bytes.
 	 */
-	if (tg3_asic_rev(tp) == ASIC_REV_57766)
+	if (tg3_asic_rev(tp) == ASIC_REV_57766 ||
+	    tg3_asic_rev(tp) == ASIC_REV_5717 ||
+	    tg3_asic_rev(tp) == ASIC_REV_5719)
 		reset_phy = true;
 
 	err = tg3_restart_hw(tp, reset_phy);

drivers/net/ethernet/marvell/mvmdio.c

@@ -241,7 +241,8 @@ static int orion_mdio_probe(struct platform_device *pdev)
 			dev->regs + MVMDIO_ERR_INT_MASK);
 
 	} else if (dev->err_interrupt == -EPROBE_DEFER) {
-		return -EPROBE_DEFER;
+		ret = -EPROBE_DEFER;
+		goto out_mdio;
 	}
 
 	mutex_init(&dev->lock);

drivers/net/ethernet/marvell/mvneta.c

@@ -914,6 +914,10 @@ static void mvneta_port_disable(struct mvneta_port *pp)
 	val &= ~MVNETA_GMAC0_PORT_ENABLE;
 	mvreg_write(pp, MVNETA_GMAC_CTRL_0, val);
 
+	pp->link = 0;
+	pp->duplex = -1;
+	pp->speed = 0;
+
 	udelay(200);
 }
 

drivers/net/phy/micrel.c

@@ -541,6 +541,7 @@ static int ksz9031_read_status(struct phy_device *phydev)
 		phydev->link = 0;
 		if (phydev->drv->config_intr && phy_interrupt_is_valid(phydev))
 			phydev->drv->config_intr(phydev);
+		return genphy_config_aneg(phydev);
 	}
 
 	return 0;

drivers/net/usb/qmi_wwan.c

@@ -737,6 +737,7 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x1199, 0x9079, 10)},	/* Sierra Wireless EM74xx */
 	{QMI_FIXED_INTF(0x1199, 0x907b, 8)},	/* Sierra Wireless EM74xx */
 	{QMI_FIXED_INTF(0x1199, 0x907b, 10)},	/* Sierra Wireless EM74xx */
+	{QMI_FIXED_INTF(0x1199, 0x9091, 8)},	/* Sierra Wireless EM7565 */
 	{QMI_FIXED_INTF(0x1bbb, 0x011e, 4)},	/* Telekom Speedstick LTE II (Alcatel One Touch L100V LTE) */
 	{QMI_FIXED_INTF(0x1bbb, 0x0203, 2)},	/* Alcatel L800MA */
 	{QMI_FIXED_INTF(0x2357, 0x0201, 4)},	/* TP-LINK HSUPA Modem MA180 */

drivers/parisc/lba_pci.c

@@ -1654,3 +1654,36 @@ void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask)
 	iounmap(base_addr);
 }
 
+
+/*
+ * The design of the Diva management card in rp34x0 machines (rp3410, rp3440)
+ * seems rushed, so that many built-in components simply don't work.
+ * The following quirks disable the serial AUX port and the built-in ATI RV100
+ * Radeon 7000 graphics card which both don't have any external connectors and
+ * thus are useless, and even worse, e.g. the AUX port occupies ttyS0 and as
+ * such makes those machines the only PARISC machines on which we can't use
+ * ttyS0 as boot console.
+ */
+static void quirk_diva_ati_card(struct pci_dev *dev)
+{
+	if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
+	    dev->subsystem_device != 0x1292)
+		return;
+
+	dev_info(&dev->dev, "Hiding Diva built-in ATI card");
+	dev->device = 0;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RADEON_QY,
+	quirk_diva_ati_card);
+
+static void quirk_diva_aux_disable(struct pci_dev *dev)
+{
+	if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
+	    dev->subsystem_device != 0x1291)
+		return;
+
+	dev_info(&dev->dev, "Hiding Diva built-in AUX serial device");
+	dev->device = 0;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_AUX,
+	quirk_diva_aux_disable);

drivers/pci/pci-driver.c

@@ -944,7 +944,12 @@ static int pci_pm_thaw_noirq(struct device *dev)
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_resume_early(dev);
 
-	pci_update_current_state(pci_dev, PCI_D0);
+	/*
+	 * pci_restore_state() requires the device to be in D0 (because of MSI
+	 * restoration among other things), so force it into D0 in case the
+	 * driver's "freeze" callbacks put it into a low-power state directly.
+	 */
+	pci_set_power_state(pci_dev, PCI_D0);
 	pci_restore_state(pci_dev);
 
 	if (drv && drv->pm && drv->pm->thaw_noirq)

drivers/spi/spi-xilinx.c

@@ -271,6 +271,7 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 	while (remaining_words) {
 		int n_words, tx_words, rx_words;
 		u32 sr;
+		int stalled;
 
 		n_words = min(remaining_words, xspi->buffer_size);
 
@@ -299,7 +300,17 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 
 		/* Read out all the data from the Rx FIFO */
 		rx_words = n_words;
+		stalled = 10;
 		while (rx_words) {
+			if (rx_words == n_words && !(stalled--) &&
+			    !(sr & XSPI_SR_TX_EMPTY_MASK) &&
+			    (sr & XSPI_SR_RX_EMPTY_MASK)) {
+				dev_err(&spi->dev,
+					"Detected stall. Check C_SPI_MODE and C_SPI_MEMORY\n");
+				xspi_init_hw(xspi);
+				return -EIO;
+			}
+
 			if ((sr & XSPI_SR_TX_EMPTY_MASK) && (rx_words > 1)) {
 				xilinx_spi_rx(xspi);
 				rx_words--;

drivers/tty/n_tty.c

@@ -1801,7 +1801,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
 	struct n_tty_data *ldata = tty->disc_data;
 
-	if (!old || (old->c_lflag ^ tty->termios.c_lflag) & ICANON) {
+	if (!old || (old->c_lflag ^ tty->termios.c_lflag) & (ICANON | EXTPROC)) {
 		bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
 		ldata->line_start = ldata->read_tail;
 		if (!L_ICANON(tty) || !read_cnt(ldata)) {
@@ -2493,7 +2493,7 @@ static int n_tty_ioctl(struct tty_struct *tty, struct file *file,
 		return put_user(tty_chars_in_buffer(tty), (int __user *) arg);
 	case TIOCINQ:
 		down_write(&tty->termios_rwsem);
-		if (L_ICANON(tty))
+		if (L_ICANON(tty) && !L_EXTPROC(tty))
 			retval = inq_canon(ldata);
 		else
 			retval = read_cnt(ldata);

drivers/usb/core/config.c

@@ -973,7 +973,7 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 		case USB_SSP_CAP_TYPE:
 			ssp_cap = (struct usb_ssp_cap_descriptor *)buffer;
 			ssac = (le32_to_cpu(ssp_cap->bmAttributes) &
-				USB_SSP_SUBLINK_SPEED_ATTRIBS) + 1;
+				USB_SSP_SUBLINK_SPEED_ATTRIBS);
 			if (length >= USB_DT_USB_SSP_CAP_SIZE(ssac))
 				dev->bos->ssp_cap = ssp_cap;
 			break;

drivers/usb/core/quirks.c

@@ -57,10 +57,11 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Microsoft LifeCam-VX700 v2.0 */
 	{ USB_DEVICE(0x045e, 0x0770), .driver_info = USB_QUIRK_RESET_RESUME },
 
-	/* Logitech HD Pro Webcams C920, C920-C and C930e */
+	/* Logitech HD Pro Webcams C920, C920-C, C925e and C930e */
 	{ USB_DEVICE(0x046d, 0x082d), .driver_info = USB_QUIRK_DELAY_INIT },
 	{ USB_DEVICE(0x046d, 0x0841), .driver_info = USB_QUIRK_DELAY_INIT },
 	{ USB_DEVICE(0x046d, 0x0843), .driver_info = USB_QUIRK_DELAY_INIT },
+	{ USB_DEVICE(0x046d, 0x085b), .driver_info = USB_QUIRK_DELAY_INIT },
 
 	/* Logitech ConferenceCam CC3000e */
 	{ USB_DEVICE(0x046d, 0x0847), .driver_info = USB_QUIRK_DELAY_INIT },
@@ -154,6 +155,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Genesys Logic hub, internally used by KY-688 USB 3.1 Type-C Hub */
 	{ USB_DEVICE(0x05e3, 0x0612), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* ELSA MicroLink 56K */
+	{ USB_DEVICE(0x05cc, 0x2267), .driver_info = USB_QUIRK_RESET_RESUME },
+
 	/* Genesys Logic hub, internally used by Moshi USB to Ethernet Adapter */
 	{ USB_DEVICE(0x05e3, 0x0616), .driver_info = USB_QUIRK_NO_LPM },
 

drivers/usb/host/xhci-pci.c

@@ -184,6 +184,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 		xhci->quirks |= XHCI_BROKEN_STREAMS;
 	}
+	if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
+			pdev->device == 0x0014)
+		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 	if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 			pdev->device == 0x0015)
 		xhci->quirks |= XHCI_RESET_ON_RESUME;

drivers/usb/serial/ftdi_sio.c

@@ -1017,6 +1017,7 @@ static const struct usb_device_id id_table_combined[] = {
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(CYPRESS_VID, CYPRESS_WICED_BT_USB_PID) },
 	{ USB_DEVICE(CYPRESS_VID, CYPRESS_WICED_WL_USB_PID) },
+	{ USB_DEVICE(AIRBUS_DS_VID, AIRBUS_DS_P8GR) },
 	{ }					/* Terminating entry */
 };
 

drivers/usb/serial/ftdi_sio_ids.h

@@ -913,6 +913,12 @@
 #define ICPDAS_I7561U_PID		0x0104
 #define ICPDAS_I7563U_PID		0x0105
 
+/*
+ * Airbus Defence and Space
+ */
+#define AIRBUS_DS_VID			0x1e8e  /* Vendor ID */
+#define AIRBUS_DS_P8GR			0x6001  /* Tetra P8GR */
+
 /*
  * RT Systems programming cables for various ham radios
  */

drivers/usb/serial/option.c

@@ -236,6 +236,8 @@ static void option_instat_callback(struct urb *urb);
 /* These Quectel products use Qualcomm's vendor ID */
 #define QUECTEL_PRODUCT_UC20			0x9003
 #define QUECTEL_PRODUCT_UC15			0x9090
+/* These Yuga products use Qualcomm's vendor ID */
+#define YUGA_PRODUCT_CLM920_NC5			0x9625
 
 #define QUECTEL_VENDOR_ID			0x2c7c
 /* These Quectel products use Quectel's vendor ID */
@@ -283,6 +285,7 @@ static void option_instat_callback(struct urb *urb);
 #define TELIT_PRODUCT_LE922_USBCFG3		0x1043
 #define TELIT_PRODUCT_LE922_USBCFG5		0x1045
 #define TELIT_PRODUCT_ME910			0x1100
+#define TELIT_PRODUCT_ME910_DUAL_MODEM		0x1101
 #define TELIT_PRODUCT_LE920			0x1200
 #define TELIT_PRODUCT_LE910			0x1201
 #define TELIT_PRODUCT_LE910_USBCFG4		0x1206
@@ -648,6 +651,11 @@ static const struct option_blacklist_info telit_me910_blacklist = {
 	.reserved = BIT(1) | BIT(3),
 };
 
+static const struct option_blacklist_info telit_me910_dual_modem_blacklist = {
+	.sendsetup = BIT(0),
+	.reserved = BIT(3),
+};
+
 static const struct option_blacklist_info telit_le910_blacklist = {
 	.sendsetup = BIT(0),
 	.reserved = BIT(1) | BIT(2),
@@ -677,6 +685,10 @@ static const struct option_blacklist_info cinterion_rmnet2_blacklist = {
 	.reserved = BIT(4) | BIT(5),
 };
 
+static const struct option_blacklist_info yuga_clm920_nc5_blacklist = {
+	.reserved = BIT(1) | BIT(4),
+};
+
 static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
 	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
@@ -1181,6 +1193,9 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, QUECTEL_PRODUCT_UC15)},
 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, QUECTEL_PRODUCT_UC20),
 	  .driver_info = (kernel_ulong_t)&net_intf4_blacklist },
+	/* Yuga products use Qualcomm vendor ID */
+	{ USB_DEVICE(QUALCOMM_VENDOR_ID, YUGA_PRODUCT_CLM920_NC5),
+	  .driver_info = (kernel_ulong_t)&yuga_clm920_nc5_blacklist },
 	/* Quectel products using Quectel vendor ID */
 	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC21),
 	  .driver_info = (kernel_ulong_t)&net_intf4_blacklist },
@@ -1247,6 +1262,8 @@ static const struct usb_device_id option_ids[] = {
 		.driver_info = (kernel_ulong_t)&telit_le922_blacklist_usbcfg0 },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910),
 		.driver_info = (kernel_ulong_t)&telit_me910_blacklist },
+	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910_DUAL_MODEM),
+		.driver_info = (kernel_ulong_t)&telit_me910_dual_modem_blacklist },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE910),
 		.driver_info = (kernel_ulong_t)&telit_le910_blacklist },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE910_USBCFG4),

drivers/usb/serial/qcserial.c

@@ -166,6 +166,8 @@ static const struct usb_device_id id_table[] = {
 	{DEVICE_SWI(0x1199, 0x9079)},	/* Sierra Wireless EM74xx */
 	{DEVICE_SWI(0x1199, 0x907a)},	/* Sierra Wireless EM74xx QDL */
 	{DEVICE_SWI(0x1199, 0x907b)},	/* Sierra Wireless EM74xx */
+	{DEVICE_SWI(0x1199, 0x9090)},	/* Sierra Wireless EM7565 QDL */
+	{DEVICE_SWI(0x1199, 0x9091)},	/* Sierra Wireless EM7565 */
 	{DEVICE_SWI(0x413c, 0x81a2)},	/* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
 	{DEVICE_SWI(0x413c, 0x81a3)},	/* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
 	{DEVICE_SWI(0x413c, 0x81a4)},	/* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
@@ -346,6 +348,7 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 			break;
 		case 2:
 			dev_dbg(dev, "NMEA GPS interface found\n");
+			sendsetup = true;
 			break;
 		case 3:
 			dev_dbg(dev, "Modem port found\n");

drivers/usb/usbip/stub_main.c

@@ -252,11 +252,12 @@ void stub_device_cleanup_urbs(struct stub_device *sdev)
 	struct stub_priv *priv;
 	struct urb *urb;
 
-	dev_dbg(&sdev->udev->dev, "free sdev %p\n", sdev);
+	dev_dbg(&sdev->udev->dev, "Stub device cleaning up urbs\n");
 
 	while ((priv = stub_priv_pop(sdev))) {
 		urb = priv->urb;
-		dev_dbg(&sdev->udev->dev, "free urb %p\n", urb);
+		dev_dbg(&sdev->udev->dev, "free urb seqnum %lu\n",
+			priv->seqnum);
 		usb_kill_urb(urb);
 
 		kmem_cache_free(stub_priv_cache, priv);

drivers/usb/usbip/stub_rx.c

@@ -230,9 +230,6 @@ static int stub_recv_cmd_unlink(struct stub_device *sdev,
 		if (priv->seqnum != pdu->u.cmd_unlink.seqnum)
 			continue;
 
-		dev_info(&priv->urb->dev->dev, "unlink urb %p\n",
-			 priv->urb);
-
 		/*
 		 * This matched urb is not completed yet (i.e., be in
 		 * flight in usb hcd hardware/driver). Now we are
@@ -271,8 +268,8 @@ static int stub_recv_cmd_unlink(struct stub_device *sdev,
 		ret = usb_unlink_urb(priv->urb);
 		if (ret != -EINPROGRESS)
 			dev_err(&priv->urb->dev->dev,
-				"failed to unlink a urb %p, ret %d\n",
+				"failed to unlink a urb # %lu, ret %d\n",
-				priv->urb, ret);
+				priv->seqnum, ret);
 
 		return 0;
 	}

drivers/usb/usbip/stub_tx.c

@@ -201,8 +201,8 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 
 		/* 1. setup usbip_header */
 		setup_ret_submit_pdu(&pdu_header, urb);
-		usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
+		usbip_dbg_stub_tx("setup txdata seqnum: %d\n",
-				  pdu_header.base.seqnum, urb);
+				  pdu_header.base.seqnum);
 		usbip_header_correct_endian(&pdu_header, 1);
 
 		iov[iovnum].iov_base = &pdu_header;

drivers/usb/usbip/vhci_hcd.c

@@ -467,9 +467,6 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 	int ret = 0;
 	struct vhci_device *vdev;
 
-	usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
-			  hcd, urb, mem_flags);
-
 	/* patch to usb_sg_init() is in 2.5.60 */
 	BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
 
@@ -627,8 +624,6 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 	struct vhci_priv *priv;
 	struct vhci_device *vdev;
 
-	pr_info("dequeue a urb %p\n", urb);
-
 	spin_lock(&the_controller->lock);
 
 	priv = urb->hcpriv;
@@ -656,7 +651,6 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		/* tcp connection is closed */
 		spin_lock(&vdev->priv_lock);
 
-		pr_info("device %p seems to be disconnected\n", vdev);
 		list_del(&priv->list);
 		kfree(priv);
 		urb->hcpriv = NULL;
@@ -668,8 +662,6 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		 * vhci_rx will receive RET_UNLINK and give back the URB.
 		 * Otherwise, we give back it here.
 		 */
-		pr_info("gives back urb %p\n", urb);
-
 		usb_hcd_unlink_urb_from_ep(hcd, urb);
 
 		spin_unlock(&the_controller->lock);
@@ -698,8 +690,6 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 
 		unlink->unlink_seqnum = priv->seqnum;
 
-		pr_info("device %p seems to be still connected\n", vdev);
-
 		/* send cmd_unlink and try to cancel the pending URB in the
 		 * peer */
 		list_add_tail(&unlink->list, &vdev->unlink_tx);

drivers/usb/usbip/vhci_rx.c

@@ -37,24 +37,23 @@ struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum)
 		urb = priv->urb;
 		status = urb->status;
 
-		usbip_dbg_vhci_rx("find urb %p vurb %p seqnum %u\n",
+		usbip_dbg_vhci_rx("find urb seqnum %u\n", seqnum);
-				urb, priv, seqnum);
 
 		switch (status) {
 		case -ENOENT:
 			/* fall through */
 		case -ECONNRESET:
-			dev_info(&urb->dev->dev,
+			dev_dbg(&urb->dev->dev,
-				 "urb %p was unlinked %ssynchronuously.\n", urb,
+				 "urb seq# %u was unlinked %ssynchronuously\n",
-				 status == -ENOENT ? "" : "a");
+				 seqnum, status == -ENOENT ? "" : "a");
 			break;
 		case -EINPROGRESS:
 			/* no info output */
 			break;
 		default:
-			dev_info(&urb->dev->dev,
+			dev_dbg(&urb->dev->dev,
-				 "urb %p may be in a error, status %d\n", urb,
+				 "urb seq# %u may be in a error, status %d\n",
-				 status);
+				 seqnum, status);
 		}
 
 		list_del(&priv->list);
@@ -78,8 +77,8 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
 	spin_unlock(&vdev->priv_lock);
 
 	if (!urb) {
-		pr_err("cannot find a urb of seqnum %u\n", pdu->base.seqnum);
+		pr_err("cannot find a urb of seqnum %u max seqnum %d\n",
-		pr_info("max seqnum %d\n",
+			pdu->base.seqnum,
 			atomic_read(&the_controller->seqnum));
 		usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
 		return;
@@ -102,7 +101,7 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
 	if (usbip_dbg_flag_vhci_rx)
 		usbip_dump_urb(urb);
 
-	usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
+	usbip_dbg_vhci_rx("now giveback urb %u\n", pdu->base.seqnum);
 
 	spin_lock(&the_controller->lock);
 	usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
@@ -165,7 +164,7 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
 		pr_info("the urb (seqnum %d) was already given back\n",
 			pdu->base.seqnum);
 	} else {
-		usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
+		usbip_dbg_vhci_rx("now giveback urb %d\n", pdu->base.seqnum);
 
 		/* If unlink is successful, status is -ECONNRESET */
 		urb->status = pdu->u.ret_unlink.status;

drivers/usb/usbip/vhci_tx.c

@@ -82,7 +82,8 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)
 		memset(&msg, 0, sizeof(msg));
 		memset(&iov, 0, sizeof(iov));
 
-		usbip_dbg_vhci_tx("setup txdata urb %p\n", urb);
+		usbip_dbg_vhci_tx("setup txdata urb seqnum %lu\n",
+				  priv->seqnum);
 
 		/* 1. setup usbip_header */
 		setup_cmd_submit_pdu(&pdu_header, urb);

include/crypto/mcryptd.h

@@ -26,6 +26,7 @@ static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
 
 struct mcryptd_cpu_queue {
 	struct crypto_queue queue;
+	spinlock_t q_lock;
 	struct work_struct work;
 };
 

include/linux/ipv6.h

@@ -218,7 +218,8 @@ struct ipv6_pinfo {
 						 * 100: prefer care-of address
 						 */
 				dontfrag:1,
-				autoflowlabel:1;
+				autoflowlabel:1,
+				autoflowlabel_set:1;
 	__u8			min_hopcount;
 	__u8			tclass;
 	__be32			rcv_flowinfo;

include/linux/vm_event_item.h

@@ -80,10 +80,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 #endif
 #endif
 #ifdef CONFIG_DEBUG_TLBFLUSH
-#ifdef CONFIG_SMP
 		NR_TLB_REMOTE_FLUSH,	/* cpu tried to flush others' tlbs */
 		NR_TLB_REMOTE_FLUSH_RECEIVED,/* cpu received ipi for flush */
-#endif /* CONFIG_SMP */
 		NR_TLB_LOCAL_FLUSH_ALL,
 		NR_TLB_LOCAL_FLUSH_ONE,
 #endif /* CONFIG_DEBUG_TLBFLUSH */

include/net/ip.h

@@ -33,6 +33,8 @@
 #include <net/flow.h>
 #include <net/flow_dissector.h>
 
+#define IPV4_MIN_MTU		68			/* RFC 791 */
+
 struct sock;
 
 struct inet_skb_parm {

kernel/time/tick-sched.c

@@ -568,6 +568,11 @@ static void tick_nohz_restart(struct tick_sched *ts, ktime_t now)
 		tick_program_event(hrtimer_get_expires(&ts->sched_timer), 1);
 }
 
+static inline bool local_timer_softirq_pending(void)
+{
+	return local_softirq_pending() & TIMER_SOFTIRQ;
+}
+
 static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
 					 ktime_t now, int cpu)
 {
@@ -584,8 +589,18 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
 	} while (read_seqretry(&jiffies_lock, seq));
 	ts->last_jiffies = basejiff;
 
-	if (rcu_needs_cpu(basemono, &next_rcu) ||
+	/*
-	    arch_needs_cpu() || irq_work_needs_cpu()) {
+	 * Keep the periodic tick, when RCU, architecture or irq_work
+	 * requests it.
+	 * Aside of that check whether the local timer softirq is
+	 * pending. If so its a bad idea to call get_next_timer_interrupt()
+	 * because there is an already expired timer, so it will request
+	 * immeditate expiry, which rearms the hardware timer with a
+	 * minimal delta which brings us back to this place
+	 * immediately. Lather, rinse and repeat...
+	 */
+	if (rcu_needs_cpu(basemono, &next_rcu) || arch_needs_cpu() ||
+	    irq_work_needs_cpu() || local_timer_softirq_pending()) {
 		next_tick = basemono + TICK_NSEC;
 	} else {
 		/*

kernel/trace/ring_buffer.c

@@ -280,6 +280,8 @@ EXPORT_SYMBOL_GPL(ring_buffer_event_data);
 /* Missed count stored at end */
 #define RB_MISSED_STORED	(1 << 30)
 
+#define RB_MISSED_FLAGS		(RB_MISSED_EVENTS|RB_MISSED_STORED)
+
 struct buffer_data_page {
 	u64		 time_stamp;	/* page time stamp */
 	local_t		 commit;	/* write committed index */
@@ -331,7 +333,9 @@ static void rb_init_page(struct buffer_data_page *bpage)
  */
 size_t ring_buffer_page_len(void *page)
 {
-	return local_read(&((struct buffer_data_page *)page)->commit)
+	struct buffer_data_page *bpage = page;
+
+	return (local_read(&bpage->commit) & ~RB_MISSED_FLAGS)
 		+ BUF_PAGE_HDR_SIZE;
 }
 

kernel/trace/trace.c

@@ -5844,7 +5844,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		.spd_release	= buffer_spd_release,
 	};
 	struct buffer_ref *ref;
-	int entries, size, i;
+	int entries, i;
 	ssize_t ret = 0;
 
 #ifdef CONFIG_TRACER_MAX_TRACE
@@ -5895,14 +5895,6 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 			break;
 		}
 
-		/*
-		 * zero out any left over data, this is going to
-		 * user land.
-		 */
-		size = ring_buffer_page_len(ref->page);
-		if (size < PAGE_SIZE)
-			memset(ref->page + size, 0, PAGE_SIZE - size);
-
 		page = virt_to_page(ref->page);
 
 		spd.pages[i] = page;
@@ -6629,6 +6621,7 @@ allocate_trace_buffer(struct trace_array *tr, struct trace_buffer *buf, int size
 	buf->data = alloc_percpu(struct trace_array_cpu);
 	if (!buf->data) {
 		ring_buffer_free(buf->buffer);
+		buf->buffer = NULL;
 		return -ENOMEM;
 	}
 
@@ -6652,7 +6645,9 @@ static int allocate_trace_buffers(struct trace_array *tr, int size)
 				    allocate_snapshot ? size : 1);
 	if (WARN_ON(ret)) {
 		ring_buffer_free(tr->trace_buffer.buffer);
+		tr->trace_buffer.buffer = NULL;
 		free_percpu(tr->trace_buffer.data);
+		tr->trace_buffer.data = NULL;
 		return -ENOMEM;
 	}
 	tr->allocated_snapshot = allocate_snapshot;

net/bridge/br_netlink.c

@@ -1067,19 +1067,20 @@ static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 	struct net_bridge *br = netdev_priv(dev);
 	int err;
 
+	err = register_netdevice(dev);
+	if (err)
+		return err;
+
 	if (tb[IFLA_ADDRESS]) {
 		spin_lock_bh(&br->lock);
 		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 		spin_unlock_bh(&br->lock);
 	}
 
-	err = register_netdevice(dev);
-	if (err)
-		return err;
-
 	err = br_changelink(dev, tb, data);
 	if (err)
-		unregister_netdevice(dev);
+		br_dev_delete(dev, NULL);
+
 	return err;
 }
 

net/core/net_namespace.c

@@ -261,7 +261,7 @@ struct net *get_net_ns_by_id(struct net *net, int id)
 	spin_lock_irqsave(&net->nsid_lock, flags);
 	peer = idr_find(&net->netns_ids, id);
 	if (peer)
-		get_net(peer);
+		peer = maybe_get_net(peer);
 	spin_unlock_irqrestore(&net->nsid_lock, flags);
 	rcu_read_unlock();
 

net/core/skbuff.c

@@ -3676,7 +3676,7 @@ void skb_complete_tx_timestamp(struct sk_buff *skb,
 	struct sock *sk = skb->sk;
 
 	if (!skb_may_tx_timestamp(sk, false))
-		return;
+		goto err;
 
 	/* Take a reference to prevent skb_orphan() from freeing the socket,
 	 * but only if the socket refcount is not zero.
@@ -3685,7 +3685,11 @@ void skb_complete_tx_timestamp(struct sk_buff *skb,
 		*skb_hwtstamps(skb) = *hwtstamps;
 		__skb_complete_tx_timestamp(skb, sk, SCM_TSTAMP_SND);
 		sock_put(sk);
+		return;
 	}
+
+err:
+	kfree_skb(skb);
 }
 EXPORT_SYMBOL_GPL(skb_complete_tx_timestamp);
 

net/ipv4/devinet.c

@@ -1358,7 +1358,7 @@ skip:
 
 static bool inetdev_valid_mtu(unsigned int mtu)
 {
-	return mtu >= 68;
+	return mtu >= IPV4_MIN_MTU;
 }
 
 static void inetdev_send_gratuitous_arp(struct net_device *dev,

net/ipv4/fib_frontend.c

@@ -1253,7 +1253,7 @@ fail:
 
 static void ip_fib_net_exit(struct net *net)
 {
-	unsigned int i;
+	int i;
 
 	rtnl_lock();
 #ifdef CONFIG_IP_MULTIPLE_TABLES
@@ -1261,7 +1261,12 @@ static void ip_fib_net_exit(struct net *net)
 	RCU_INIT_POINTER(net->ipv4.fib_main, NULL);
 	RCU_INIT_POINTER(net->ipv4.fib_default, NULL);
 #endif
-	for (i = 0; i < FIB_TABLE_HASHSZ; i++) {
+	/* Destroy the tables in reverse order to guarantee that the
+	 * local table, ID 255, is destroyed before the main table, ID
+	 * 254. This is necessary as the local table may contain
+	 * references to data contained in the main table.
+	 */
+	for (i = FIB_TABLE_HASHSZ - 1; i >= 0; i--) {
 		struct hlist_head *head = &net->ipv4.fib_table_hash[i];
 		struct hlist_node *tmp;
 		struct fib_table *tb;

net/ipv4/igmp.c

@@ -89,6 +89,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/times.h>
 #include <linux/pkt_sched.h>
+#include <linux/byteorder/generic.h>
 
 #include <net/net_namespace.h>
 #include <net/arp.h>
@@ -327,6 +328,23 @@ igmp_scount(struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted)
 	return scount;
 }
 
+/* source address selection per RFC 3376 section 4.2.13 */
+static __be32 igmpv3_get_srcaddr(struct net_device *dev,
+				 const struct flowi4 *fl4)
+{
+	struct in_device *in_dev = __in_dev_get_rcu(dev);
+
+	if (!in_dev)
+		return htonl(INADDR_ANY);
+
+	for_ifa(in_dev) {
+		if (inet_ifa_match(fl4->saddr, ifa))
+			return fl4->saddr;
+	} endfor_ifa(in_dev);
+
+	return htonl(INADDR_ANY);
+}
+
 static struct sk_buff *igmpv3_newpack(struct net_device *dev, unsigned int mtu)
 {
 	struct sk_buff *skb;
@@ -374,7 +392,7 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, unsigned int mtu)
 	pip->frag_off = htons(IP_DF);
 	pip->ttl      = 1;
 	pip->daddr    = fl4.daddr;
-	pip->saddr    = fl4.saddr;
+	pip->saddr    = igmpv3_get_srcaddr(dev, &fl4);
 	pip->protocol = IPPROTO_IGMP;
 	pip->tot_len  = 0;	/* filled in later */
 	ip_select_ident(net, skb, NULL);
@@ -410,16 +428,17 @@ static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel)
 }
 
 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
-	int type, struct igmpv3_grec **ppgr)
+	int type, struct igmpv3_grec **ppgr, unsigned int mtu)
 {
 	struct net_device *dev = pmc->interface->dev;
 	struct igmpv3_report *pih;
 	struct igmpv3_grec *pgr;
 
-	if (!skb)
+	if (!skb) {
-		skb = igmpv3_newpack(dev, dev->mtu);
+		skb = igmpv3_newpack(dev, mtu);
-	if (!skb)
+		if (!skb)
-		return NULL;
+			return NULL;
+	}
 	pgr = (struct igmpv3_grec *)skb_put(skb, sizeof(struct igmpv3_grec));
 	pgr->grec_type = type;
 	pgr->grec_auxwords = 0;
@@ -441,12 +460,17 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 	struct igmpv3_grec *pgr = NULL;
 	struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list;
 	int scount, stotal, first, isquery, truncate;
+	unsigned int mtu;
 
 	if (pmc->multiaddr == IGMP_ALL_HOSTS)
 		return skb;
 	if (ipv4_is_local_multicast(pmc->multiaddr) && !sysctl_igmp_llm_reports)
 		return skb;
 
+	mtu = READ_ONCE(dev->mtu);
+	if (mtu < IPV4_MIN_MTU)
+		return skb;
+
 	isquery = type == IGMPV3_MODE_IS_INCLUDE ||
 		  type == IGMPV3_MODE_IS_EXCLUDE;
 	truncate = type == IGMPV3_MODE_IS_EXCLUDE ||
@@ -467,7 +491,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 		    AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
 			if (skb)
 				igmpv3_sendpack(skb);
-			skb = igmpv3_newpack(dev, dev->mtu);
+			skb = igmpv3_newpack(dev, mtu);
 		}
 	}
 	first = 1;
@@ -494,12 +518,12 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 				pgr->grec_nsrcs = htons(scount);
 			if (skb)
 				igmpv3_sendpack(skb);
-			skb = igmpv3_newpack(dev, dev->mtu);
+			skb = igmpv3_newpack(dev, mtu);
 			first = 1;
 			scount = 0;
 		}
 		if (first) {
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 			first = 0;
 		}
 		if (!skb)
@@ -533,7 +557,7 @@ empty_source:
 				igmpv3_sendpack(skb);
 				skb = NULL; /* add_grhead will get a new one */
 			}
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 		}
 	}
 	if (pgr)

net/ipv4/ip_tunnel.c

@@ -400,8 +400,8 @@ static int ip_tunnel_bind_dev(struct net_device *dev)
 	dev->needed_headroom = t_hlen + hlen;
 	mtu -= (dev->hard_header_len + t_hlen);
 
-	if (mtu < 68)
+	if (mtu < IPV4_MIN_MTU)
-		mtu = 68;
+		mtu = IPV4_MIN_MTU;
 
 	return mtu;
 }

net/ipv4/raw.c

@@ -500,11 +500,16 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	int err;
 	struct ip_options_data opt_copy;
 	struct raw_frag_vec rfv;
+	int hdrincl;
 
 	err = -EMSGSIZE;
 	if (len > 0xFFFF)
 		goto out;
 
+	/* hdrincl should be READ_ONCE(inet->hdrincl)
+	 * but READ_ONCE() doesn't work with bit fields
+	 */
+	hdrincl = inet->hdrincl;
 	/*
 	 *	Check the flags.
 	 */
@@ -579,7 +584,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 		/* Linux does not mangle headers on raw sockets,
 		 * so that IP options + IP_HDRINCL is non-sense.
 		 */
-		if (inet->hdrincl)
+		if (hdrincl)
 			goto done;
 		if (ipc.opt->opt.srr) {
 			if (!daddr)
@@ -601,9 +606,9 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 
 	flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
 			   RT_SCOPE_UNIVERSE,
-			   inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
+			   hdrincl ? IPPROTO_RAW : sk->sk_protocol,
 			   inet_sk_flowi_flags(sk) |
-			    (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
+			    (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
 			   daddr, saddr, 0, 0, sk->sk_uid);
 
 	if (!saddr && ipc.oif) {
@@ -612,7 +617,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 			goto done;
 	}
 
-	if (!inet->hdrincl) {
+	if (!hdrincl) {
 		rfv.msg = msg;
 		rfv.hlen = 0;
 
@@ -637,7 +642,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 		goto do_confirm;
 back_from_confirm:
 
-	if (inet->hdrincl)
+	if (hdrincl)
 		err = raw_send_hdrinc(sk, &fl4, msg, len,
 				      &rt, msg->msg_flags);
 

net/ipv4/tcp_ipv4.c

@@ -817,7 +817,7 @@ static void tcp_v4_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
 			tcp_time_stamp,
 			req->ts_recent,
 			0,
-			tcp_md5_do_lookup(sk, (union tcp_md5_addr *)&ip_hdr(skb)->daddr,
+			tcp_md5_do_lookup(sk, (union tcp_md5_addr *)&ip_hdr(skb)->saddr,
 					  AF_INET),
 			inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0,
 			ip_hdr(skb)->tos);

net/ipv6/af_inet6.c

@@ -216,7 +216,6 @@ lookup_protocol:
 	np->mcast_hops	= IPV6_DEFAULT_MCASTHOPS;
 	np->mc_loop	= 1;
 	np->pmtudisc	= IPV6_PMTUDISC_WANT;
-	np->autoflowlabel = ip6_default_np_autolabel(sock_net(sk));
 	sk->sk_ipv6only	= net->ipv6.sysctl.bindv6only;
 
 	/* Init the ipv4 part of the socket since we can have sockets

net/ipv6/ip6_output.c

@@ -148,6 +148,14 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
 
+static bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
+{
+	if (!np->autoflowlabel_set)
+		return ip6_default_np_autolabel(net);
+	else
+		return np->autoflowlabel;
+}
+
 /*
  * xmit an sk_buff (used by TCP, SCTP and DCCP)
  * Note : socket lock is not held for SYNACK packets, but might be modified
@@ -211,7 +219,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 		hlimit = ip6_dst_hoplimit(dst);
 
 	ip6_flow_hdr(hdr, tclass, ip6_make_flowlabel(net, skb, fl6->flowlabel,
-						     np->autoflowlabel, fl6));
+				ip6_autoflowlabel(net, np), fl6));
 
 	hdr->payload_len = htons(seg_len);
 	hdr->nexthdr = proto;
@@ -1675,7 +1683,7 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 
 	ip6_flow_hdr(hdr, v6_cork->tclass,
 		     ip6_make_flowlabel(net, skb, fl6->flowlabel,
-					np->autoflowlabel, fl6));
+					ip6_autoflowlabel(net, np), fl6));
 	hdr->hop_limit = v6_cork->hop_limit;
 	hdr->nexthdr = proto;
 	hdr->saddr = fl6->saddr;

net/ipv6/ipv6_sockglue.c

@@ -872,6 +872,7 @@ pref_skip_coa:
 		break;
 	case IPV6_AUTOFLOWLABEL:
 		np->autoflowlabel = valbool;
+		np->autoflowlabel_set = 1;
 		retv = 0;
 		break;
 	}

net/ipv6/mcast.c

@@ -1668,16 +1668,16 @@ static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
 }
 
 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
-	int type, struct mld2_grec **ppgr)
+	int type, struct mld2_grec **ppgr, unsigned int mtu)
 {
-	struct net_device *dev = pmc->idev->dev;
 	struct mld2_report *pmr;
 	struct mld2_grec *pgr;
 
-	if (!skb)
+	if (!skb) {
-		skb = mld_newpack(pmc->idev, dev->mtu);
+		skb = mld_newpack(pmc->idev, mtu);
-	if (!skb)
+		if (!skb)
-		return NULL;
+			return NULL;
+	}
 	pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
 	pgr->grec_type = type;
 	pgr->grec_auxwords = 0;
@@ -1700,10 +1700,15 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 	struct mld2_grec *pgr = NULL;
 	struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
 	int scount, stotal, first, isquery, truncate;
+	unsigned int mtu;
 
 	if (pmc->mca_flags & MAF_NOREPORT)
 		return skb;
 
+	mtu = READ_ONCE(dev->mtu);
+	if (mtu < IPV6_MIN_MTU)
+		return skb;
+
 	isquery = type == MLD2_MODE_IS_INCLUDE ||
 		  type == MLD2_MODE_IS_EXCLUDE;
 	truncate = type == MLD2_MODE_IS_EXCLUDE ||
@@ -1724,7 +1729,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 		    AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
 			if (skb)
 				mld_sendpack(skb);
-			skb = mld_newpack(idev, dev->mtu);
+			skb = mld_newpack(idev, mtu);
 		}
 	}
 	first = 1;
@@ -1751,12 +1756,12 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 				pgr->grec_nsrcs = htons(scount);
 			if (skb)
 				mld_sendpack(skb);
-			skb = mld_newpack(idev, dev->mtu);
+			skb = mld_newpack(idev, mtu);
 			first = 1;
 			scount = 0;
 		}
 		if (first) {
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 			first = 0;
 		}
 		if (!skb)
@@ -1790,7 +1795,7 @@ empty_source:
 				mld_sendpack(skb);
 				skb = NULL; /* add_grhead will get a new one */
 			}
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 		}
 	}
 	if (pgr)

net/ipv6/tcp_ipv6.c

@@ -951,7 +951,7 @@ static void tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
 			tcp_rsk(req)->rcv_nxt,
 			req->rsk_rcv_wnd >> inet_rsk(req)->rcv_wscale,
 			tcp_time_stamp, req->ts_recent, sk->sk_bound_dev_if,
-			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr),
+			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->saddr),
 			0, 0);
 }
 

net/netlink/af_netlink.c

@@ -261,6 +261,9 @@ static int __netlink_deliver_tap_skb(struct sk_buff *skb,
 	struct sock *sk = skb->sk;
 	int ret = -ENOMEM;
 
+	if (!net_eq(dev_net(dev), sock_net(sk)))
+		return 0;
+
 	dev_hold(dev);
 
 	if (is_vmalloc_addr(skb->head))

net/sctp/socket.c

@@ -4153,7 +4153,7 @@ static int sctp_init_sock(struct sock *sk)
 	SCTP_DBG_OBJCNT_INC(sock);
 
 	local_bh_disable();
-	percpu_counter_inc(&sctp_sockets_allocated);
+	sk_sockets_allocated_inc(sk);
 	sock_prot_inuse_add(net, sk->sk_prot, 1);
 
 	/* Nothing can fail after this block, otherwise
@@ -4197,7 +4197,7 @@ static void sctp_destroy_sock(struct sock *sk)
 	}
 	sctp_endpoint_free(sp->ep);
 	local_bh_disable();
-	percpu_counter_dec(&sctp_sockets_allocated);
+	sk_sockets_allocated_dec(sk);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
 	local_bh_enable();
 }

sound/core/rawmidi.c

@@ -579,15 +579,14 @@ static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
 	return 0;
 }
 
-int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
+static int __snd_rawmidi_info_select(struct snd_card *card,
+				     struct snd_rawmidi_info *info)
 {
 	struct snd_rawmidi *rmidi;
 	struct snd_rawmidi_str *pstr;
 	struct snd_rawmidi_substream *substream;
 
-	mutex_lock(&register_mutex);
 	rmidi = snd_rawmidi_search(card, info->device);
-	mutex_unlock(&register_mutex);
 	if (!rmidi)
 		return -ENXIO;
 	if (info->stream < 0 || info->stream > 1)
@@ -603,6 +602,16 @@ int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info
 	}
 	return -ENXIO;
 }
+
+int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
+{
+	int ret;
+
+	mutex_lock(&register_mutex);
+	ret = __snd_rawmidi_info_select(card, info);
+	mutex_unlock(&register_mutex);
+	return ret;
+}
 EXPORT_SYMBOL(snd_rawmidi_info_select);
 
 static int snd_rawmidi_info_select_user(struct snd_card *card,

sound/hda/hdac_i915.c

@@ -183,7 +183,7 @@ static int hdac_component_master_match(struct device *dev, void *data)
  */
 int snd_hdac_i915_register_notifier(const struct i915_audio_component_audio_ops *aops)
 {
-	if (WARN_ON(!hdac_acomp))
+	if (!hdac_acomp)
 		return -ENODEV;
 
 	hdac_acomp->audio_ops = aops;

sound/pci/hda/patch_realtek.c

@@ -5953,6 +5953,11 @@ static const struct snd_hda_pin_quirk alc269_pin_fixup_tbl[] = {
 	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
 		{0x1b, 0x01011020},
 		{0x21, 0x02211010}),
+	SND_HDA_PIN_QUIRK(0x10ec0256, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
+		{0x12, 0x90a60130},
+		{0x14, 0x90170110},
+		{0x1b, 0x01011020},
+		{0x21, 0x0221101f}),
 	SND_HDA_PIN_QUIRK(0x10ec0256, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
 		{0x12, 0x90a60160},
 		{0x14, 0x90170120},

sound/soc/codecs/twl4030.c

@@ -232,7 +232,7 @@ static struct twl4030_codec_data *twl4030_get_pdata(struct snd_soc_codec *codec)
 	struct twl4030_codec_data *pdata = dev_get_platdata(codec->dev);
 	struct device_node *twl4030_codec_node = NULL;
 
-	twl4030_codec_node = of_find_node_by_name(codec->dev->parent->of_node,
+	twl4030_codec_node = of_get_child_by_name(codec->dev->parent->of_node,
 						  "codec");
 
 	if (!pdata && twl4030_codec_node) {
@@ -241,9 +241,11 @@ static struct twl4030_codec_data *twl4030_get_pdata(struct snd_soc_codec *codec)
 				     GFP_KERNEL);
 		if (!pdata) {
 			dev_err(codec->dev, "Can not allocate memory\n");
+			of_node_put(twl4030_codec_node);
 			return NULL;
 		}
 		twl4030_setup_pdata_of(pdata, twl4030_codec_node);
+		of_node_put(twl4030_codec_node);
 	}
 
 	return pdata;

sound/soc/fsl/fsl_ssi.c

@@ -1408,12 +1408,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 				sizeof(fsl_ssi_ac97_dai));
 
 		fsl_ac97_data = ssi_private;
-
-		ret = snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev);
-		if (ret) {
-			dev_err(&pdev->dev, "could not set AC'97 ops\n");
-			return ret;
-		}
 	} else {
 		/* Initialize this copy of the CPU DAI driver structure */
 		memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template,
@@ -1473,6 +1467,14 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 			return ret;
 	}
 
+	if (fsl_ssi_is_ac97(ssi_private)) {
+		ret = snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev);
+		if (ret) {
+			dev_err(&pdev->dev, "could not set AC'97 ops\n");
+			goto error_ac97_ops;
+		}
+	}
+
 	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_ssi_component,
 					      &ssi_private->cpu_dai_drv, 1);
 	if (ret) {
@@ -1556,6 +1558,10 @@ error_sound_card:
 	fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);
 
 error_asoc_register:
+	if (fsl_ssi_is_ac97(ssi_private))
+		snd_soc_set_ac97_ops(NULL);
+
+error_ac97_ops:
 	if (ssi_private->soc->imx)
 		fsl_ssi_imx_clean(pdev, ssi_private);
 

sound/usb/mixer.c

@@ -2101,20 +2101,25 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
 	kctl->private_value = (unsigned long)namelist;
 	kctl->private_free = usb_mixer_selector_elem_free;
 
-	nameid = uac_selector_unit_iSelector(desc);
+	/* check the static mapping table at first */
 	len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
-	if (len)
-		;
-	else if (nameid)
-		len = snd_usb_copy_string_desc(state, nameid, kctl->id.name,
-					 sizeof(kctl->id.name));
-	else
-		len = get_term_name(state, &state->oterm,
-				    kctl->id.name, sizeof(kctl->id.name), 0);
-
 	if (!len) {
-		strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
+		/* no mapping ? */
+		/* if iSelector is given, use it */
+		nameid = uac_selector_unit_iSelector(desc);
+		if (nameid)
+			len = snd_usb_copy_string_desc(state, nameid,
+						       kctl->id.name,
+						       sizeof(kctl->id.name));
+		/* ... or pick up the terminal name at next */
+		if (!len)
+			len = get_term_name(state, &state->oterm,
+				    kctl->id.name, sizeof(kctl->id.name), 0);
+		/* ... or use the fixed string "USB" as the last resort */
+		if (!len)
+			strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
 
+		/* and add the proper suffix */
 		if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
 			append_ctl_name(kctl, " Clock Source");
 		else if ((state->oterm.type & 0xff00) == 0x0100)

tools/usb/usbip/src/utils.c

@@ -30,6 +30,7 @@ int modify_match_busid(char *busid, int add)
 	char command[SYSFS_BUS_ID_SIZE + 4];
 	char match_busid_attr_path[SYSFS_PATH_MAX];
 	int rc;
+	int cmd_size;
 
 	snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
 		 "%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
@@ -37,12 +38,14 @@ int modify_match_busid(char *busid, int add)
 		 attr_name);
 
 	if (add)
-		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s", busid);
+		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s",
+				    busid);
 	else
-		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s", busid);
+		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s",
+				    busid);
 
 	rc = write_sysfs_attribute(match_busid_attr_path, command,
-				   sizeof(command));
+				   cmd_size);
 	if (rc < 0) {
 		dbg("failed to write match_busid: %s", strerror(errno));
 		return -1;