* refs/heads/tmp-26c8156:
Linux 4.4.49
drm/i915: fix use-after-free in page_flip_completed()
ALSA: seq: Don't handle loop timeout at snd_seq_pool_done()
ALSA: seq: Fix race at creating a queue
xen-netfront: Delete rx_refill_timer in xennet_disconnect_backend()
scsi: mpt3sas: disable ASPM for MPI2 controllers
scsi: aacraid: Fix INTx/MSI-x issue with older controllers
scsi: zfcp: fix use-after-free by not tracing WKA port open/close on failed send
netvsc: Set maximum GSO size in the right place
mac80211: Fix adding of mesh vendor IEs
ARM: 8642/1: LPAE: catch pending imprecise abort on unmask
target: Fix COMPARE_AND_WRITE ref leak for non GOOD status
target: Fix early transport_generic_handle_tmr abort scenario
target: Use correct SCSI status during EXTENDED_COPY exception
target: Don't BUG_ON during NodeACL dynamic -> explicit conversion
ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
hns: avoid stack overflow with CONFIG_KASAN
cpumask: use nr_cpumask_bits for parsing functions
Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback"
selinux: fix off-by-one in setprocattr
ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup
Linux 4.4.48
base/memory, hotplug: fix a kernel oops in show_valid_zones()
x86/irq: Make irq activate operations symmetric
USB: serial: option: add device ID for HP lt2523 (Novatel E371)
usb: gadget: f_fs: Assorted buffer overflow checks.
USB: Add quirk for WORLDE easykey.25 MIDI keyboard
USB: serial: pl2303: add ATEN device ID
USB: serial: qcserial: add Dell DW5570 QDL
KVM: x86: do not save guest-unsupported XSAVE state
HID: wacom: Fix poor prox handling in 'wacom_pl_irq'
percpu-refcount: fix reference leak during percpu-atomic transition
mmc: sdhci: Ignore unexpected CARD_INT interrupts
can: bcm: fix hrtimer/tasklet termination in bcm op removal
mm, fs: check for fatal signals in do_generic_file_read()
mm/memory_hotplug.c: check start_pfn in test_pages_in_a_zone()
cifs: initialize file_info_lock
zswap: disable changing params if init fails
svcrpc: fix oops in absence of krb5 module
NFSD: Fix a null reference case in find_or_create_lock_stateid()
powerpc: Add missing error check to prom_find_boot_cpu()
powerpc/eeh: Fix wrong flag passed to eeh_unfreeze_pe()
libata: apply MAX_SEC_1024 to all CX1-JB*-HP devices
ata: sata_mv:- Handle return value of devm_ioremap.
perf/core: Fix PERF_RECORD_MMAP2 prot/flags for anonymous memory
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
crypto: api - Clear CRYPTO_ALG_DEAD bit before registering an alg
drm/nouveau/nv1a,nv1f/disp: fix memory clock rate retrieval
drm/nouveau/disp/gt215: Fix HDA ELD handling (thus, HDMI audio) on gt215
ext4: validate s_first_meta_bg at mount time
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
ANDROID: security: export security_path_chown()
Linux 4.4.47
net: dsa: Bring back device detaching in dsa_slave_suspend()
qmi_wwan/cdc_ether: add device ID for HP lt2523 (Novatel E371) WWAN card
af_unix: move unix_mknod() out of bindlock
r8152: don't execute runtime suspend if the tx is not empty
bridge: netlink: call br_changelink() during br_dev_newlink()
tcp: initialize max window for a new fastopen socket
ipv6: addrconf: Avoid addrconf_disable_change() using RCU read-side lock
net: phy: bcm63xx: Utilize correct config_intr function
net: fix harmonize_features() vs NETIF_F_HIGHDMA
ax25: Fix segfault after sock connection timeout
ravb: do not use zero-length alignment DMA descriptor
openvswitch: maintain correct checksum state in conntrack actions
tcp: fix tcp_fastopen unaligned access complaints on sparc
net: systemport: Decouple flow control from __bcm_sysport_tx_reclaim
net: ipv4: fix table id in getroute response
net: lwtunnel: Handle lwtunnel_fill_encap failure
mlxsw: pci: Fix EQE structure definition
mlxsw: switchx2: Fix memory leak at skb reallocation
mlxsw: spectrum: Fix memory leak at skb reallocation
r8152: fix the sw rx checksum is unavailable
ANDROID: sdcardfs: Switch strcasecmp for internal call
ANDROID: sdcardfs: switch to full_name_hash and qstr
ANDROID: sdcardfs: Add GID Derivation to sdcardfs
ANDROID: sdcardfs: Remove redundant operation
ANDROID: sdcardfs: add support for user permission isolation
ANDROID: sdcardfs: Refactor configfs interface
ANDROID: sdcardfs: Allow non-owners to touch
ANDROID: binder: fix format specifier for type binder_size_t
ANDROID: fs: Export vfs_rmdir2
ANDROID: fs: Export free_fs_struct and set_fs_pwd
ANDROID: mnt: remount should propagate to slaves of slaves
ANDROID: sdcardfs: Switch ->d_inode to d_inode()
ANDROID: sdcardfs: Fix locking issue with permision fix up
ANDROID: sdcardfs: Change magic value
ANDROID: sdcardfs: Use per mount permissions
ANDROID: sdcardfs: Add gid and mask to private mount data
ANDROID: sdcardfs: User new permission2 functions
ANDROID: vfs: Add setattr2 for filesystems with per mount permissions
ANDROID: vfs: Add permission2 for filesystems with per mount permissions
ANDROID: vfs: Allow filesystems to access their private mount data
ANDROID: mnt: Add filesystem private data to mount points
ANDROID: sdcardfs: Move directory unlock before touch
ANDROID: sdcardfs: fix external storage exporting incorrect uid
ANDROID: sdcardfs: Added top to sdcardfs_inode_info
ANDROID: sdcardfs: Switch package list to RCU
ANDROID: sdcardfs: Fix locking for permission fix up
ANDROID: sdcardfs: Check for other cases on path lookup
ANDROID: sdcardfs: override umask on mkdir and create
Linux 4.4.46
mm, memcg: do not retry precharge charges
platform/x86: intel_mid_powerbtn: Set IRQ_ONESHOT
pinctrl: broxton: Use correct PADCFGLOCK offset
s5k4ecgx: select CRC32 helper
IB/umem: Release pid in error and ODP flow
IB/ipoib: move back IB LL address into the hard header
drm/i915: Don't leak edid in intel_crt_detect_ddc()
SUNRPC: cleanup ida information when removing sunrpc module
NFSv4.0: always send mode in SETATTR after EXCLUSIVE4
nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header
ARC: [arcompact] handle unaligned access delay slot corner case
ARC: udelay: fix inline assembler by adding LP_COUNT to clobber list
can: ti_hecc: add missing prepare and unprepare of the clock
can: c_can_pci: fix null-pointer-deref in c_can_start() - set device pointer
s390/ptrace: Preserve previous registers for short regset write
RDMA/cma: Fix unknown symbol when CONFIG_IPV6 is not enabled
ISDN: eicon: silence misleading array-bounds warning
sysctl: fix proc_doulongvec_ms_jiffies_minmax()
mm/mempolicy.c: do not put mempolicy before using its nodemask
drm: Fix broken VT switch with video=1366x768 option
tile/ptrace: Preserve previous registers for short regset write
fbdev: color map copying bounds checking
Linux 4.4.45
arm64: avoid returning from bad_mode
selftest/powerpc: Wrong PMC initialized in pmc56_overflow test
dmaengine: pl330: Fix runtime PM support for terminated transfers
ite-cir: initialize use_demodulator before using it
blackfin: check devm_pinctrl_get() for errors
ARM: 8613/1: Fix the uaccess crash on PB11MPCore
ARM: ux500: fix prcmu_is_cpu_in_wfi() calculation
ARM: dts: imx6qdl-nitrogen6_max: fix sgtl5000 pinctrl init
arm64/ptrace: Reject attempts to set incomplete hardware breakpoint fields
arm64/ptrace: Avoid uninitialised struct padding in fpr_set()
arm64/ptrace: Preserve previous registers for short regset write - 3
arm64/ptrace: Preserve previous registers for short regset write - 2
arm64/ptrace: Preserve previous registers for short regset write
ARM: dts: da850-evm: fix read access to SPI flash
ceph: fix bad endianness handling in parse_reply_info_extra
ARM: 8634/1: hw_breakpoint: blacklist Scorpion CPUs
svcrdma: avoid duplicate dma unmapping during error recovery
clocksource/exynos_mct: Clear interrupt when cpu is shut down
ubifs: Fix journal replay wrt. xattr nodes
qla2xxx: Fix crash due to null pointer access
x86/ioapic: Restore IO-APIC irq_chip retrigger callback
mtd: nand: xway: disable module support
ieee802154: atusb: do not use the stack for buffers to make them DMA able
mmc: mxs-mmc: Fix additional cycles after transmission stop
HID: corsair: fix control-transfer error handling
HID: corsair: fix DMA buffers on stack
PCI: Enumerate switches below PCI-to-PCIe bridges
fuse: clear FR_PENDING flag when moving requests out of pending queue
svcrpc: don't leak contexts on PROC_DESTROY
x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F
tmpfs: clear S_ISGID when setting posix ACLs
ARM: dts: imx31: fix AVIC base address
ARM: dts: imx31: move CCM device node to AIPS2 bus devices
ARM: dts: imx31: fix clock control module interrupts description
perf scripting: Avoid leaking the scripting_context variable
IB/IPoIB: Remove can't use GFP_NOIO warning
IB/mlx4: When no DMFS for IPoIB, don't allow NET_IF QPs
IB/mlx4: Fix port query for 56Gb Ethernet links
IB/mlx4: Fix out-of-range array index in destroy qp flow
IB/mlx4: Set traffic class in AH
IB/mlx5: Wait for all async command completions to complete
ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it
Linux 4.4.44
pinctrl: sh-pfc: Do not unconditionally support PIN_CONFIG_BIAS_DISABLE
powerpc/ibmebus: Fix device reference leaks in sysfs interface
powerpc/ibmebus: Fix further device reference leaks
bus: vexpress-config: fix device reference leak
blk-mq: Always schedule hctx->next_cpu
ACPI / APEI: Fix NMI notification handling
block: cfq_cpd_alloc() should use @gfp
cpufreq: powernv: Disable preemption while checking CPU throttling state
NFSv4.1: nfs4_fl_prepare_ds must be careful about reporting success.
NFS: Fix a performance regression in readdir
pNFS: Fix race in pnfs_wait_on_layoutreturn
pinctrl: meson: fix gpio request disabling other modes
btrfs: fix error handling when run_delayed_extent_op fails
btrfs: fix locking when we put back a delayed ref that's too new
x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option
USB: serial: ch341: fix modem-control and B0 handling
USB: serial: ch341: fix resume after reset
drm/radeon: drop verde dpm quirks
sysctl: Drop reference added by grab_header in proc_sys_readdir
sysrq: attach sysrq handler correctly for 32-bit kernel
tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx
mnt: Protect the mountpoint hashtable with mount_lock
vme: Fix wrong pointer utilization in ca91cx42_slave_get
xhci: fix deadlock at host remove by running watchdog correctly
i2c: fix kernel memory disclosure in dev interface
i2c: print correct device invalid address
Input: elants_i2c - avoid divide by 0 errors on bad touchscreen data
USB: serial: ch341: fix open and resume after B0
USB: serial: ch341: fix control-message error handling
USB: serial: ch341: fix open error handling
USB: serial: ch341: fix initial modem-control state
USB: serial: kl5kusb105: fix line-state error handling
nl80211: fix sched scan netlink socket owner destruction
KVM: x86: Introduce segmented_write_std
KVM: x86: emulate FXSAVE and FXRSTOR
KVM: x86: add asm_safe wrapper
KVM: x86: add Align16 instruction flag
KVM: x86: flush pending lapic jump label updates on module unload
jump_labels: API for flushing deferred jump label updates
KVM: eventfd: fix NULL deref irqbypass consumer
KVM: x86: fix emulation of "MOV SS, null selector"
mm/hugetlb.c: fix reservation race when freeing surplus pages
ocfs2: fix crash caused by stale lvb with fsdlm plugin
mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
selftests: do not require bash for the generated test
selftests: do not require bash to run netsocktests testcase
Input: i8042 - add Pegatron touchpad to noloop table
Input: xpad - use correct product id for x360w controllers
DEBUG: sched/fair: Fix sched_load_avg_cpu events for task_groups
DEBUG: sched/fair: Fix missing sched_load_avg_cpu events
net: socket: don't set sk_uid to garbage value in ->setattr()
ANDROID: configs: CONFIG_ARM64_SW_TTBR0_PAN=y
UPSTREAM: arm64: Disable PAN on uaccess_enable()
UPSTREAM: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN
UPSTREAM: arm64: xen: Enable user access before a privcmd hvc call
UPSTREAM: arm64: Handle faults caused by inadvertent user access with PAN enabled
BACKPORT: arm64: Disable TTBR0_EL1 during normal kernel execution
BACKPORT: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1
BACKPORT: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro
BACKPORT: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros
UPSTREAM: arm64: alternative: add auto-nop infrastructure
UPSTREAM: arm64: barriers: introduce nops and __nops macros for NOP sequences
Revert "FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros"
Revert "FROMLIST: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro"
Revert "FROMLIST: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1"
Revert "FROMLIST: arm64: Disable TTBR0_EL1 during normal kernel execution"
Revert "FROMLIST: arm64: Handle faults caused by inadvertent user access with PAN enabled"
Revert "FROMLIST: arm64: xen: Enable user access before a privcmd hvc call"
Revert "FROMLIST: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN"
ANDROID: sched/walt: fix build failure if FAIR_GROUP_SCHED=n
Linux 4.4.43
mm/init: fix zone boundary creation
ALSA: usb-audio: Add a quirk for Plantronics BT600
spi: mvebu: fix baudrate calculation for armada variant
ARM: OMAP4+: Fix bad fallthrough for cpuidle
ARM: zynq: Reserve correct amount of non-DMA RAM
powerpc: Fix build warning on 32-bit PPC
ALSA: firewire-tascam: Fix to handle error from initialization of stream data
HID: hid-cypress: validate length of report
net: vrf: do not allow table id 0
net: ipv4: Fix multipath selection with vrf
gro: Disable frag0 optimization on IPv6 ext headers
gro: use min_t() in skb_gro_reset_offset()
gro: Enter slow-path if there is no tailroom
r8152: fix rx issue for runtime suspend
r8152: split rtl8152_suspend function
ipv4: Do not allow MAIN to be alias for new LOCAL w/ custom rules
igmp: Make igmp group member RFC 3376 compliant
drop_monitor: consider inserted data in genlmsg_end
drop_monitor: add missing call to genlmsg_end
net/mlx5: Avoid shadowing numa_node
net/mlx5: Check FW limitations on log_max_qp before setting it
net: stmmac: Fix race between stmmac_drv_probe and stmmac_open
net, sched: fix soft lockup in tc_classify
ipv6: handle -EFAULT from skb_copy_bits
net: vrf: Drop conntrack data after pass through VRF device on Tx
ser_gigaset: return -ENOMEM on error instead of success
netvsc: reduce maximum GSO size
Linux 4.4.42
usb: gadget: composite: always set ep->mult to a sensible value
Revert "usb: gadget: composite: always set ep->mult to a sensible value"
tick/broadcast: Prevent NULL pointer dereference
drm/radeon: Always store CRTC relative radeon_crtc->cursor_x/y values
cx23885-dvb: move initialization of a8293_pdata
net: vxge: avoid unused function warnings
net: ti: cpmac: Fix compiler warning due to type confusion
cred/userns: define current_user_ns() as a function
staging: comedi: dt282x: tidy up register bit defines
powerpc/pci/rpadlpar: Fix device reference leaks
md: MD_RECOVERY_NEEDED is set for mddev->recovery
crypto: arm64/aes-ce - fix for big endian
crypto: arm64/aes-xts-ce: fix for big endian
crypto: arm64/sha1-ce - fix for big endian
crypto: arm64/aes-neon - fix for big endian
crypto: arm64/aes-ccm-ce: fix for big endian
crypto: arm/aes-ce - fix for big endian
crypto: arm64/ghash-ce - fix for big endian
crypto: arm64/sha2-ce - fix for big endian
s390/crypto: unlock on error in prng_tdes_read()
mmc: mmc_test: Uninitialized return value
PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend
irqchip/bcm7038-l1: Implement irq_cpu_offline() callback
target/iscsi: Fix double free in lio_target_tiqn_addtpg()
scsi: mvsas: fix command_active typo
ASoC: samsung: i2s: Fixup last IRQ unsafe spin lock call
iommu/vt-d: Flush old iommu caches for kdump when the device gets context mapped
iommu/vt-d: Fix pasid table size encoding
iommu/amd: Fix the left value check of cmd buffer
iommu/amd: Missing error code in amd_iommu_init_device()
clk: imx31: fix rewritten input argument of mx31_clocks_init()
clk: clk-wm831x: fix a logic error
hwmon: (g762) Fix overflows and crash seen when writing limit attributes
hwmon: (nct7802) Fix overflows seen when writing into limit attributes
hwmon: (ds620) Fix overflows seen when writing temperature limits
hwmon: (amc6821) sign extension temperature
hwmon: (scpi) Fix module autoload
cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected
ath10k: use the right length of "background"
stable-fixup: hotplug: fix unused function warning
usb: dwc3: ep0: explicitly call dwc3_ep0_prepare_one_trb()
usb: dwc3: ep0: add dwc3_ep0_prepare_one_trb()
usb: dwc3: gadget: always unmap EP0 requests
staging: iio: ad7606: fix improper setting of oversampling pins
mei: bus: fix mei_cldev_enable KDoc
USB: serial: io_ti: bind to interface after fw download
USB: phy: am335x-control: fix device and of_node leaks
ARM: dts: r8a7794: Correct hsusb parent clock
USB: serial: kl5kusb105: abort on open exception path
ALSA: usb-audio: Fix bogus error return in snd_usb_create_stream()
usb: musb: blackfin: add bfin_fifo_offset in bfin_ops
usb: hub: Move hub_port_disable() to fix warning if PM is disabled
usb: musb: Fix trying to free already-free IRQ 4
usb: dwc3: pci: add Intel Gemini Lake PCI ID
xhci: Fix race related to abort operation
xhci: Use delayed_work instead of timer for command timeout
usb: xhci-mem: use passed in GFP flags instead of GFP_KERNEL
USB: serial: mos7720: fix parallel probe
USB: serial: mos7720: fix parport use-after-free on probe errors
USB: serial: mos7720: fix use-after-free on probe errors
USB: serial: mos7720: fix NULL-deref at open
USB: serial: mos7840: fix NULL-deref at open
USB: serial: kobil_sct: fix NULL-deref in write
USB: serial: cyberjack: fix NULL-deref at open
USB: serial: oti6858: fix NULL-deref at open
USB: serial: io_edgeport: fix NULL-deref at open
USB: serial: ti_usb_3410_5052: fix NULL-deref at open
USB: serial: garmin_gps: fix memory leak on failed URB submit
USB: serial: iuu_phoenix: fix NULL-deref at open
USB: serial: io_ti: fix I/O after disconnect
USB: serial: io_ti: fix another NULL-deref at open
USB: serial: io_ti: fix NULL-deref at open
USB: serial: spcp8x5: fix NULL-deref at open
USB: serial: keyspan_pda: verify endpoints at probe
USB: serial: pl2303: fix NULL-deref at open
USB: serial: quatech2: fix sleep-while-atomic in close
USB: serial: omninet: fix NULL-derefs at open and disconnect
usb: xhci: hold lock over xhci_abort_cmd_ring()
xhci: Handle command completion and timeout race
usb: host: xhci: Fix possible wild pointer when handling abort command
usb: xhci: fix return value of xhci_setup_device()
xhci: free xhci virtual devices with leaf nodes first
usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Apollo Lake
xhci: workaround for hosts missing CAS bit
usb: xhci: fix possible wild pointer
usb: dwc3: core: avoid Overflow events
usb: gadget: composite: Test get_alt() presence instead of set_alt()
USB: dummy-hcd: fix bug in stop_activity (handle ep0)
USB: fix problems with duplicate endpoint addresses
USB: gadgetfs: fix checks of wTotalLength in config descriptors
USB: gadgetfs: fix use-after-free bug
USB: gadgetfs: fix unbounded memory allocation bug
usb: gadgetfs: restrict upper bound on device configuration size
usb: storage: unusual_uas: Add JMicron JMS56x to unusual device
usb: musb: dsps: implement clear_ep_rxintr() callback
usb: musb: core: add clear_ep_rxintr() to musb_platform_ops
KVM: MIPS: Flush KVM entry code from icache globally
KVM: x86: reset MMU on KVM_SET_VCPU_EVENTS
mac80211: initialize fast-xmit 'info' later
ARM: davinci: da850: don't add emac clock to lookup table twice
ALSA: usb-audio: Fix irq/process data synchronization
ALSA: hda - Apply asus-mode8 fixup to ASUS X71SL
ALSA: hda - Fix up GPIO for ASUS ROG Ranger
Linux 4.4.41
net: mvpp2: fix dma unmapping of TX buffers for fragments
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
kconfig/nconf: Fix hang when editing symbol with a long prompt
target/user: Fix use-after-free of tcmu_cmds if they are expired
powerpc: Convert cmp to cmpd in idle enter sequence
powerpc/ps3: Fix system hang with GCC 5 builds
nfs_write_end(): fix handling of short copies
libceph: verify authorize reply on connect
PCI: Check for PME in targeted sleep state
Input: drv260x - fix input device's parent assignment
media: solo6x10: fix lockup by avoiding delayed register write
IB/cma: Fix a race condition in iboe_addr_get_sgid()
IB/multicast: Check ib_find_pkey() return value
IPoIB: Avoid reading an uninitialized member variable
IB/mad: Fix an array index check
fgraph: Handle a case where a tracer ignores set_graph_notrace
platform/x86: asus-nb-wmi.c: Add X45U quirk
ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it
kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)
KVM: PPC: Book3S HV: Don't lose hardware R/C bit updates in H_PROTECT
KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state
md/raid5: limit request size according to implementation limits
sc16is7xx: Drop bogus use of IRQF_ONESHOT
s390/vmlogrdr: fix IUCV buffer allocation
firmware: fix usermode helper fallback loading
ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache
scsi: avoid a permanent stop of the scsi device's request queue
scsi: zfcp: fix rport unblock race with LUN recovery
scsi: zfcp: do not trace pure benign residual HBA responses at default level
scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
scsi: megaraid_sas: Do not set MPI2_TYPE_CUDA for JBOD FP path for FW which does not support JBOD sequence map
scsi: megaraid_sas: For SRIOV enabled firmware, ensure VF driver waits for 30secs before reset
vt: fix Scroll Lock LED trigger name
block: protect iterate_bdevs() against concurrent close
mei: request async autosuspend at the end of enumeration
drivers/gpu/drm/ast: Fix infinite loop if read fails
drm/gma500: Add compat ioctl
drm/radeon: add additional pci revision to dpm workaround
drm/radeon: Hide the HW cursor while it's out of bounds
drm/radeon: Also call cursor_move_locked when the cursor size changes
drm/nouveau/i2c/gk110b,gm10x: use the correct implementation
drm/nouveau/fifo/gf100-: protect channel preempt with subdev mutex
drm/nouveau/ltc: protect clearing of comptags with mutex
drm/nouveau/bios: require checksum to match for fast acpi shadow method
drm/nouveau/kms: lvds panel strap moved again on maxwell
ACPI / video: Add force_native quirk for HP Pavilion dv6
ACPI / video: Add force_native quirk for Dell XPS 17 L702X
staging: comedi: ni_mio_common: fix E series ni_ai_insn_read() data
staging: comedi: ni_mio_common: fix M Series ni_ai_insn_read() data mask
thermal: hwmon: Properly report critical temperature in sysfs
clk: bcm2835: Avoid overwriting the div info when disabling a pll_div clk
timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion
regulator: stw481x-vmmc: fix ages old enable error
mmc: sdhci: Fix recovery from tuning timeout
ath9k: Really fix LED polarity for some Mini PCI AR9220 MB92 cards.
cfg80211/mac80211: fix BSS leaks when abandoning assoc attempts
rtlwifi: Fix enter/exit power_save
ssb: Fix error routine when fallback SPROM fails
Linux 4.4.40
ppp: defer netns reference release for ppp channel
driver core: fix race between creating/querying glue dir and its cleanup
xfs: set AGI buffer type in xlog_recover_clear_agi_bucket
arm/xen: Use alloc_percpu rather than __alloc_percpu
xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
tpm xen: Remove bogus tpm_chip_unregister
kernel/debug/debug_core.c: more properly delay for secondary CPUs
kernel/watchdog: use nmi registers snapshot in hardlockup handler
CIFS: Fix a possible memory corruption in push locks
CIFS: Fix missing nls unload in smb2_reconnect()
CIFS: Fix a possible memory corruption during reconnect
ASoC: intel: Fix crash at suspend/resume without card registration
dm space map metadata: fix 'struct sm_metadata' leak on failed create
dm crypt: mark key as invalid until properly loaded
dm flakey: return -EINVAL on interval bounds error in flakey_ctr()
blk-mq: Do not invoke .queue_rq() for a stopped queue
usb: gadget: composite: always set ep->mult to a sensible value
exec: Ensure mm->user_ns contains the execed files
fs: exec: apply CLOEXEC before changing dumpable task flags
mm/vmscan.c: set correct defer count for shrinker
loop: return proper error from loop_queue_rq()
f2fs: set ->owner for debugfs status file's file_operations
ext4: do not perform data journaling when data is encrypted
ext4: return -ENOMEM instead of success
ext4: reject inodes with negative size
ext4: add sanity checking to count_overhead()
ext4: fix in-superblock mount options processing
ext4: use more strict checks for inodes_per_block on mount
ext4: fix stack memory corruption with 64k block size
ext4: fix mballoc breakage with 64k block size
crypto: caam - fix AEAD givenc descriptors
ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
block_dev: don't test bdev->bd_contains when it is not stable
btrfs: make file clone aware of fatal signals
Btrfs: don't BUG() during drop snapshot
Btrfs: fix memory leak in do_walk_down
Btrfs: don't leak reloc root nodes on error
Btrfs: return gracefully from balance if fs tree is corrupted
Btrfs: bail out if block group has different mixed flag
Btrfs: fix memory leak in reading btree blocks
clk: ti: omap36xx: Work around sprz319 advisory 2.1
ALSA: hda: when comparing pin configurations, ignore assoc in addition to seq
ALSA: hda - Gate the mic jack on HP Z1 Gen3 AiO
ALSA: hda - fix headset-mic problem on a Dell laptop
ALSA: hda - ignore the assoc and seq when comparing pin configurations
ALSA: hda/ca0132 - Add quirk for Alienware 15 R2 2016
ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
ALSA: usb-audio: Add QuickCam Communicate Deluxe/S7500 to volume_control_quirks
USB: UHCI: report non-PME wakeup signalling for Intel hardware
usb: gadget: composite: correctly initialize ep->maxpacket
usb: gadget: f_uac2: fix error handling at afunc_bind
usb: hub: Fix auto-remount of safely removed or ejected USB-3 devices
USB: cdc-acm: add device id for GW Instek AFG-125
USB: serial: kl5kusb105: fix open error path
USB: serial: option: add dlink dwm-158
USB: serial: option: add support for Telit LE922A PIDs 0x1040, 0x1041
Btrfs: fix qgroup rescan worker initialization
btrfs: store and load values of stripes_min/stripes_max in balance status item
Btrfs: fix tree search logic when replaying directory entry deletes
btrfs: limit async_work allocation and worker func duration
ANDROID: trace: net: use %pK for kernel pointers
ANDROID: android-base: Enable QUOTA related configs
net: ipv4: Don't crash if passing a null sk to ip_rt_update_pmtu.
net: inet: Support UID-based routing in IP protocols.
Revert "net: ipv6: fix virtual tunneling build"
net: core: add UID to flows, rules, and routes
net: core: Add a UID field to struct sock.
Revert "net: core: Support UID-based routing."
Revert "net: core: Handle 'sk' being NULL in UID-based routing"
Revert "ANDROID: net: fix 'const' warnings"
Revert "ANDROID: net: fib: remove duplicate assignment"
Revert "ANDROID: net: core: fix UID-based routing"
UPSTREAM: efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping
UPSTREAM: arm64: enable CONFIG_DEBUG_RODATA by default
goldfish: enable CONFIG_INET_DIAG_DESTROY
sched/walt: kill {min,max}_capacity
sched: fix wrong truncation of walt_avg
ANDROID: dm verity: add minimum prefetch size
Linux 4.4.39
crypto: rsa - Add Makefile dependencies to fix parallel builds
hotplug: Make register and unregister notifier API symmetric
batman-adv: Check for alloc errors when preparing TT local data
m68k: Fix ndelay() macro
arm64: futex.h: Add missing PAN toggling
can: peak: fix bad memory access and free sequence
can: raw: raw_setsockopt: limit number of can_filter that can be set
crypto: mcryptd - Check mcryptd algorithm compatibility
perf/x86: Fix full width counter, counter overflow
locking/rtmutex: Use READ_ONCE() in rt_mutex_owner()
locking/rtmutex: Prevent dequeue vs. unlock race
zram: restrict add/remove attributes to root only
parisc: Fix TLB related boot crash on SMP machines
parisc: Remove unnecessary TLB purges from flush_dcache_page_asm and flush_icache_page_asm
parisc: Purge TLB before setting PTE
powerpc/eeh: Fix deadlock when PE frozen state can't be cleared
Conflicts:
arch/arm64/kernel/traps.c
drivers/usb/dwc3/core.h
drivers/usb/dwc3/ep0.c
drivers/usb/gadget/function/f_fs.c
drivers/usb/host/xhci-mem.c
drivers/usb/host/xhci-ring.c
drivers/usb/host/xhci.c
drivers/video/fbdev/core/fbcmap.c
include/trace/events/sched.h
mm/vmscan.c
Change-Id: I3faa0010ecb98972cd8e6470377a493b56d95f89
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>
This will allow drivers to make more educated
decisions whether to defer transmission or not.
Relying on wake_tx_queue() call count implicitly
was not possible because it could be called
without queued frame count actually changing on
software tx aggregation start/stop code paths.
It was also not possible to know how long
byte-wise queue was without dequeueing.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
Git-commit: f2ac7e301ae6397669ff3f79e691942a9b5d2f39
CRs-Fixed: 1111521
Change-Id: I7b94a9ba2d68ce526a4421cc253829298d1a7620
Signed-off-by: Rajeev Kumar Sirasanagandla <rsirasan@codeaurora.org>
commit 35f432a03e41d3bf08c51ede917f94e2288fbe8c upstream.
In ieee80211_xmit_fast(), 'info' is initialized to point to the skb
that's passed in, but that skb may later be replaced by a clone (if
it was shared), leading to an invalid pointer.
This can lead to use-after-free and also later crashes since the
real SKB's info->hw_queue doesn't get initialized properly.
Fix this by assigning info only later, when it's needed, after the
skb replacement (may have) happened.
Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 6b07d9ca9b5363dda959b9582a3fc9c0b89ef3b5 upstream.
The code currently assumes that buffered multicast PS frames don't have
a pending ACK frame for tx status reporting.
However, hostapd sends a broadcast deauth frame on teardown for which tx
status is requested. This can lead to the "Have pending ack frames"
warning on module reload.
Fix this by using ieee80211_free_txskb/ieee80211_purge_tx_queue.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* I merged net-next back to avoid a conflict with the
* cfg80211 scheduled scan API extensions
* preparations for better scan result timestamping
* regulatory cleanups
* mac80211 statistics cleanups
* a few other small cleanups and fixes
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Merge tag 'mac80211-next-for-davem-2015-10-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
Here's another set of patches for the current cycle:
* I merged net-next back to avoid a conflict with the
* cfg80211 scheduled scan API extensions
* preparations for better scan result timestamping
* regulatory cleanups
* mac80211 statistics cleanups
* a few other small cleanups and fixes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Group station statistics by where they're (mostly) updated
(TX, RX and TX-status) and group them into sub-structs of
the struct sta_info.
Also rename the variables since the grouping now makes it
obvious where they belong.
This makes it easier to identify where the statistics are
updated in the code, and thus easier to think about them.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Conflicts:
drivers/net/usb/asix_common.c
net/ipv4/inet_connection_sock.c
net/switchdev/switchdev.c
In the inet_connection_sock.c case the request socket hashing scheme
is completely different in net-next.
The other two conflicts were overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
When using software queueing, tx sequence number assignment happens at
ieee80211_tx_dequeue time, so the fast-xmit codepath must not do that.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When debugging wireless powersave issues on the AP side it's quite helpful
to see our own beacons that are transmitted by the hardware/driver. However,
this is not that easy since beacons don't pass through the regular TX queues.
Preferably drivers would call ieee80211_tx_status also for tx'ed beacons
but that's not always possible. Hence, just send a copy of each beacon
generated by ieee80211_beacon_get_tim to monitor devices when they are
getting fetched by the driver.
Also add a HW flag IEEE80211_HW_BEACON_TX_STATUS that can be used by
drivers to indicate that they report TX status for beacons.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
(with a fix from Christian Lamparted rolled in)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes dropped packets in the tx path in case a non-PS station triggers
the tx filter.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
To make mac80211 accept the multicast rate requested by the user the
rate control should be told that it is operating in BSS mode.
Without this, the default rate is selected in rate_control_send_low
(!pubsta and !txrc->bss)
Signed-off-by: Bertold Van den Bergh <bertold.vandenbergh@esat.kuleuven.be>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If an SKB will be segmented by the driver, count it for multiple
MSDUs that are being transmitted rather than just a single.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
We already set a station to be associated when peering completes, both
in user space and in the kernel. Thus we should always have an
associated sta before sending data frames to that station.
Failure to check assoc state can cause crashes in the lower-level driver
due to transmitting unicast data frames before driver sta structures
(e.g. ampdu state in ath9k) are initialized. This occurred when
forwarding in the presence of fixed mesh paths: frames were transmitted
to stations with whom we hadn't yet completed peering.
Cc: stable@vger.kernel.org
Reported-by: Alexis Green <agreen@cococorp.com>
Tested-by: Jesse Jones <jjones@cococorp.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The beacon struct is already available in many contexts that
are also already in an RCU read-locked section. Avoid that by
using the existing beacon struct pointer directly.
Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>
[rewrite subject/add commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This counter is inherently racy (since it can be incremented by RX
as well as by concurrent TX) and only available in debugfs. Instead
of fixing it to be per-CPU or similar, remove it for now. If needed
it should be added without races and with proper nl80211, perhaps
even addressing the threshold reporting TODO item that's been there
since the code was originally added.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When acting as AP and a PS-Poll frame is received
associated station is marked as one in a Service
Period. This state is kept until Tx status for
released frame is reported. While a station is in
Service Period PS-Poll frames are ignored.
However if PS-Poll was received during A-MPDU
teardown it was possible to have the to-be
released frame re-queued back to pending queue.
In such case the frame was stripped of 2 important
flags:
(a) IEEE80211_TX_CTL_NO_PS_BUFFER
(b) IEEE80211_TX_STATUS_EOSP
Stripping of (a) led to the frame that was to be
released to be queued back to ps_tx_buf queue. If
station remained to use only PS-Poll frames the
re-queued frame (and new ones) was never actually
transmitted because mac80211 would ignore
subsequent PS-Poll frames due to station being in
Service Period. There was nothing left to clear
the Service Period bit (no xmit -> no tx status ->
no SP end), i.e. the AP would have the station
stuck in Service Period. Beacon TIM would
repeatedly prompt station to poll for frames but
it would get none.
Once (a) is not stripped (b) becomes important
because it's the main condition to clear the
Service Period bit of the station when Tx status
for the released frame is reported back.
This problem was observed with ath9k acting as P2P
GO in some testing scenarios but isn't limited to
it. AP operation with mac80211 based Tx A-MPDU
control combined with clients using PS-Poll frames
is subject to this race.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
As we're running out of hardware capability flags pretty quickly,
convert them to use the regular test_bit() style unsigned long
bitmaps.
This introduces a number of helper functions/macros to set and to
test the bits, along with new debugfs code.
The occurrences of an explicit __clear_bit() are intentional, the
drivers were never supposed to change their supported bits on the
fly. We should investigate changing this to be a per-frame flag.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The conversion to the fast-xmit path lost proper aggregation session
timeout handling - the last_tx wasn't set on that path and the timer
would therefore incorrectly tear down the session periodically (with
those drivers/rate control algorithms that have a timeout.)
In case of iwlwifi, this was every 5 seconds and caused significant
throughput degradation.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
For drivers supporting TSO or similar features, but that still have
PN assignment in software, there's a need to have some memory to
store the current PN value. As mac80211 already stores this and it's
somewhat complicated to add a per-driver area to the key struct (due
to the dynamic sizing thereof) it makes sense to just move the TX PN
to the keyconf, i.e. the public part of the key struct.
As TKIP is more complicated and we won't able to offload it in this
way right now (fast-xmit is skipped for TKIP unless the HW does it
all, and our hardware needs MMIC calculation in software) I've not
moved that for now - it's possible but requires exposing a lot of
the internal TKIP state.
As an bonus side effect, we can remove a lot of code by assuming the
keyseq struct has a certain layout - with BUILD_BUG_ON to verify it.
This might also improve performance, since now TX and RX no longer
share a cacheline.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
No current (and planned, as far as I know) wifi devices support
encapsulation checksum offload, so remove the useless test here.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This counter is unsafe with concurrent TX and is only exposed
through debugfs and ethtool. Instead of trying to fix it just
remove it for now, if it's really needed then it should be
exposed through nl80211 and in a way that drivers that do the
fragmentation in the device could support it as well.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This isn't all that relevant for RX right now, but TX can be concurrent
due to multi-queue and the accounting is therefore broken.
Use the standard per-CPU statistics to avoid this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This isn't necessary any more as the stack will automatically
update the TXQ's trans_start after calling ndo_start_xmit().
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Implement the necessary software segmentation on the normal
TX path so that fast-xmit can use segmentation offload if
the hardware (or driver) supports it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If drivers want to support S/G (really just gather DMA on TX) then
we can now easily support this on the fast-xmit path since it just
needs to write to the ethernet header (and already has a check for
that being possible.)
However, disallow this on the regular TX path (which has to handle
fragmentation, software crypto, etc.) by calling skb_linearize().
Also allow the related HIGHDMA since that's not interesting to the
code in mac80211 at all anyway.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When we go through the complete TX processing, there are a number
of things like fragmentation and software crypto that require the
checksum to be calculated already.
In favour of maintainability, instead of adding the necessary call
to skb_checksum_help() in all the places that need it, just do it
once before the regular TX processing.
Right now this only affects the TI wlcore and QCA ath10k drivers
since they're the only ones using checksum offload. The previous
commits enabled fast-xmit for them in almost all cases.
For wlcore this even fixes a corner case: when a key fails to be
programmed to hardware software encryption gets used, encrypting
frames with a bad checksum.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
IBSS can be supported very easily since it uses the standard station
authorization state etc. so it just needs to be covered by the header
building switch statement.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When crypto is offloaded then in some cases it's all handled
by the device, and in others only some space for the IV must
be reserved in the frame. Handle both of these cases in the
fast-xmit path, up to a limit of 18 bytes of space for IVs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If the driver handles fragmentation then it wouldn't
be done in software so we can still use the fast-xmit
path in that case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In order to speed up mac80211's TX path, add the "fast-xmit" cache
that will cache the data frame 802.11 header and other data to be
able to build the frame more quickly. This cache is rebuilt when
external triggers imply changes, but a lot of the checks done per
packet today are simplified away to the check for the cache.
There's also a more detailed description in the code.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows drivers to request per-vif and per-sta-tid queues from which
they can pull frames. This makes it easier to keep the hardware queues
short, and to improve fairness between clients and vifs.
The task of scheduling packet transmission is left up to the driver -
queueing is controlled by mac80211. Drivers can only dequeue packets by
calling ieee80211_tx_dequeue. This makes it possible to add active queue
management later without changing drivers using this code.
This can also be used as a starting point to implement A-MSDU
aggregation in a way that does not add artificially induced latency.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
[resolved minor context conflict, minor changes, endian annotations]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
of small fixes, cleanups and internal features we have:
* VHT support for TDLS and IBSS (conditional on drivers though)
* first TX performance improvements (the biggest will come later)
* many suspend/resume (race) fixes
* name_assign_type support from Tom Gundersen
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Merge tag 'mac80211-next-for-davem-2015-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
Lots of updates for net-next; along with the usual flurry
of small fixes, cleanups and internal features we have:
* VHT support for TDLS and IBSS (conditional on drivers though)
* first TX performance improvements (the biggest will come later)
* many suspend/resume (race) fixes
* name_assign_type support from Tom Gundersen
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to look up the RA station earlier to implement a TX
fastpath, factor out the lookup from ieee80211_build_hdr().
To always have a valid station pointer, also move some of the
checks into the new function.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Indicating just the peer's capability is fairly pointless
if the local device doesn't support it. Make the variable
track both combined, and remove the 'local support' check
in the TX path.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of looking up the destination station twice in the TX path
(first to build the header, and then for control processing), save
it when building the header and use it later in the TX path.
To avoid having to look up the station in the many callers, allow
those to pass %NULL which keeps the existing lookup.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In ieee80211_build_hdr(), the station is looked up to build the
header correctly (QoS field) and to check for authorization. For
mesh, authorization isn't checked here, and QoS capability is
mandatory, so the station lookup can be avoided.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If there's no station on the 4-addr VLAN interface, then frames
cannot be transmitted. Drop such frames earlier, before setting
up all the information for them.
We should keep the old check though since that code might be used
for other internally-generated frames.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
There's no need to look up the destination station twice while
building the 802.11 header for a given frame if the frame will
actually be transmitted to the station we initially looked up.
This happens for 4-addr VLAN interfaces and TDLS connections, which
both directly send the frame to the station they looked up, though
in the case of TDLS some station conditions need to be checked.
To avoid that, add a variable indicating that we've looked up the
station that the frame is going to be transmitted to, and avoid the
lookup/flag checking if it already has been done.
In the TDLS case, also move the authorized/wme_sta flag assignment
to the correct place, i.e. only when that station is really used.
Before this change, the new lookup should always have succeeded so
that the potentially erroneous data would be overwritten.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This mechanism was historic, and only ever used by IBSS, which
also doesn't need to have it as it properly manages station's
802.1X PAE state (or, with WEP, always has a key.)
Remove the mechanism to clean up the code.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The ieee80211_tx_prepare_skb() function currently entirely ignores
the fact that the SKB that is passed in might be split into more
than one due to fragmentation and doesn't check the list of skbs
that the TX handlers may create. In case this happens, it would
leak them.
Fix this and also don't leave the skb next/prev pointers dangling
pointing to the on-stack sk_buff_head.
Reported-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Revert commit ad38bfc916 ("mac80211: Tx frame latency statistics")
(along with some follow-up fixes).
This code turned out not to be as useful in the current form as we
thought, and we've internally hacked it up more, but that's not
very suitable for upstream (for now), and we might just do that
with tracing instead.
Therefore, for now at least, remove this code. We might also need
to use the skb->tstamp field for the TCP performance issue, which
is more important than the debugging.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Since multicast addresses don't exist as stations, don't attempt
to look them up in the hashtable on TX.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The current minstrel_ht rate control behavior is somewhat optimistic in
trying to find optimum TX rate. While this is usually fine for normal
Data frames, there are cases where a more conservative set of retry
parameters would be beneficial to make the connection more robust.
EAPOL frames are critical to the authentication and especially the
EAPOL-Key message 4/4 (the last message in the 4-way handshake) is
important to get through to the AP. If that message is lost, the only
recovery mechanism in many cases is to reassociate with the AP and start
from scratch. This can often be avoided by trying to send the frame with
more conservative rate and/or with more link layer retries.
In most cases, minstrel_ht is currently using the initial EAPOL-Key
frames for probing higher rates and this results in only five link layer
transmission attempts (one at high(ish) MCS and four at MCS0). While
this works with most APs, it looks like there are some deployed APs that
may have issues with the EAPOL frames using HT MCS immediately after
association. Similarly, there may be issues in cases where the signal
strength or radio environment is not good enough to be able to get
frames through even at couple of MCS 0 tries.
The best approach for this would likely to be to reduce the TX rate for
the last rate (3rd rate parameter in the set) to a low basic rate (say,
6 Mbps on 5 GHz and 2 or 5.5 Mbps on 2.4 GHz), but doing that cleanly
requires some more effort. For now, we can start with a simple one-liner
that forces the minimum rate to be used for EAPOL frames similarly how
the TX rate is selected for the IEEE 802.11 Management frames. This does
result in a small extra latency added to the cases where the AP would be
able to receive the higher rate, but taken into account how small number
of EAPOL frames are used, this is likely to be insignificant. A future
optimization in the minstrel_ht design can also allow this patch to be
reverted to get back to the more optimized initial TX rate.
It should also be noted that many drivers that do not use minstrel as
the rate control algorithm are already doing similar workarounds by
forcing the lowest TX rate to be used for EAPOL frames.
Cc: stable@vger.kernel.org
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows mac80211 to configure BIP-GMAC-128 and BIP-GMAC-256 to the
driver and also use software-implementation within mac80211 when the
driver does not support this with hardware accelaration.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows mac80211 to configure BIP-CMAC-256 to the driver and also
use software-implementation within mac80211 when the driver does not
support this with hardware accelaration.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows mac80211 to configure CCMP-256 to the driver and also use
software-implementation within mac80211 when the driver does not support
this with hardware accelaration.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
[squash ccmp256 -> mic_len argument change]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows mac80211 to configure GCMP and GCMP-256 to the driver and
also use software-implementation within mac80211 when the driver does
not support this with hardware accelaration.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
[remove a spurious newline]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When roaming / suspending, it makes no sense to wait until
the transmit queues of the device are empty. In extreme
condition they can be starved (VO saturating the air), but
even in regular cases, it is pointless to delay the roaming
because the low level driver is trying to send packets to
an AP which is far away. We'd rather drop these packets and
let TCP retransmit if needed. This will allow to speed up
the roaming.
For suspend, the explanation is even more trivial.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Implement the new counters cfg80211 can now advertise to userspace.
The TX code is in the sequence number handler, which is a bit odd,
but that place already knows the TID and frame type, so it was
easiest and least impact there.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
