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John David Anglin cf30c19534 parisc: Use implicit space register selection for loading the coherence index of I/O pdirs 
commit 63923d2c3800919774f5c651d503d1dd2adaddd5 upstream.

We only support I/O to kernel space. Using %sr1 to load the coherence
index may be racy unless interrupts are disabled. This patch changes the
code used to load the coherence index to use implicit space register
selection. This saves one instruction and eliminates the race.

Tested on rp3440, c8000 and c3750.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-11 12:24:13 +02:00
..
asp.c
ccio-dma.c parisc: Use implicit space register selection for loading the coherence index of I/O pdirs 2019-06-11 12:24:13 +02:00
ccio-rm-dma.c
dino.c parisc: pci memory bar assignment fails with 64bit kernels on dino/cujo 2017-08-24 17:02:35 -07:00
eisa.c
eisa_eeprom.c eisa_eeprom: switch to fixed_size_llseek() 2013-06-29 12:57:29 +04:00
eisa_enumerator.c treewide: Fix typo in printk messages 2015-03-06 23:05:39 +01:00
gsc.c
gsc.h
hppb.c drivers/parisc: Use printf extension %pR for struct resource 2013-02-20 22:47:24 +01:00
iommu-helpers.h parisc iommu: fix panic due to trying to allocate too large region 2015-12-12 16:07:25 +01:00
iosapic.c parisc/irq: Use access helper irq_data_get_affinity_mask() 2015-07-31 22:20:04 +02:00
iosapic_private.h
Kconfig parisc: led driver requires CONFIG_VM_EVENT_COUNTERS 2013-02-20 22:51:52 +01:00
lasi.c
lba_pci.c parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode 2018-05-30 07:49:10 +02:00
led.c procfs: new helper - PDE_DATA(inode) 2013-04-09 14:13:32 -04:00
Makefile
pdc_stable.c parisc: pdc_stable.c: Avoid potential stack overflows 2014-09-21 22:31:08 +02:00
power.c sched, cleanup, treewide: Remove set_current_state(TASK_RUNNING) after schedule() 2014-09-19 12:35:17 +02:00
README.dino
sba_iommu.c parisc: Use implicit space register selection for loading the coherence index of I/O pdirs 2019-06-11 12:24:13 +02:00
superio.c parisc: %pf is only for function pointers 2015-04-24 13:45:54 +02:00
wax.c

README.dino 

/*
** HP VISUALIZE Workstation PCI Bus Defect
**
** "HP has discovered a potential system defect that can affect
** the behavior of five models of HP VISUALIZE workstations when
** equipped with third-party or customer-installed PCI I/O expansion
** cards. The defect is limited to the HP C180, C160, C160L, B160L,
** and B132L VISUALIZE workstations, and will only be encountered
** when data is transmitted through PCI I/O expansion cards on the
** PCI bus. HP-supplied graphics cards that utilize the PCI bus are
** not affected."
**
** http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?locale=en_US&prodTypeId=12454&prodSeriesId=44443
**
**	Product		First Good Serial Number
**  C200/C240 (US)	US67350000
**B132L+/B180 (US)	US67390000
**   C200 (Europe)	3713G01000
**  B180L (Europe)	3720G01000
**
** Note that many boards were fixed/replaced under a free replacement
** program. Assume a machine is only "suspect" until proven otherwise.
**
** "The pci_check program will also be available as application
**  patch PHSS_12295"
*/