linux/drivers/char
Chris Wilson 7ccbb44344 agp/intel: Reinforce the barrier after GTT updates
commit f30d3ced9f upstream.

After changing the timing between GTT updates and execution on the GPU,
we started seeing sporadic failures on Ironlake. These were narrowed
down to being an insufficiently strong enough barrier/delay after
updating the GTT and scheduling execution on the GPU. By forcing the
uncached read, and adding the missing barrier for the singular
insert_page (relocation paths), the sporadic failures go away.

Fixes: 983d308cb8 ("agp/intel: Serialise after GTT updates")
Fixes: 3497971a71 ("agp/intel: Flush chipset writes after updating a single PTE")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Cc: stable@vger.kernel.org # v4.0+
Link: https://patchwork.freedesktop.org/patch/msgid/20200410083535.25464-1-chris@chris-wilson.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-22 09:05:08 +02:00
..
agp agp/intel: Reinforce the barrier after GTT updates 2020-06-22 09:05:08 +02:00
hw_random hwrng: imx-rngc - fix an error path 2020-04-13 10:45:10 +02:00
ipmi ipmi: fix hung processes in __get_guid() 2020-04-17 10:48:53 +02:00
mwave char/mwave: fix potential Spectre v1 vulnerability 2019-01-31 08:14:36 +01:00
pcmcia
tpm tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send() 2020-04-29 16:31:29 +02:00
xilinx_hwicap
xillybus
adi.c
apm-emulation.c
applicom.c applicom: Fix potential Spectre v1 vulnerabilities 2019-03-10 07:17:20 +01:00
applicom.h
bsr.c
ds1620.c
dsp56k.c
dtlk.c
efirtc.c
generic_nvram.c
hangcheck-timer.c
hpet.c hpet: Fix division by zero in hpet_time_div() 2019-07-31 07:27:10 +02:00
Kconfig tty: mark Siemens R3964 line discipline as BROKEN 2019-04-17 08:38:47 +02:00
lp.c lp: fix sparc64 LPSETTIMEOUT ioctl 2019-12-13 08:50:58 +01:00
Makefile
mbcs.c
mbcs.h
mem.c /dev/mem: Bail out upon SIGKILL. 2019-10-05 13:10:11 +02:00
misc.c
mspec.c
nsc_gpio.c
nvram.c
nwbutton.c
nwbutton.h
nwflash.c
pc8736x_gpio.c
powernv-op-panel.c
ppdev.c ppdev: fix PPGETTIME/PPSETTIME ioctls 2019-12-17 20:35:13 +01:00
ps3flash.c
random.c random: always use batched entropy for get_random_u{32,64} 2020-04-13 10:45:09 +02:00
raw.c
rtc.c char: rtc: remove task handling 2018-08-02 17:16:03 +02:00
scx200_gpio.c
snsc_event.c
snsc.c
snsc.h
sonypi.c
tb0219.c
tlclk.c
toshiba.c
ttyprintk.c ttyprintk: fix a potential deadlock in interrupt context issue 2020-02-05 14:43:39 +00:00
uv_mmtimer.c
virtio_console.c virtio_console: allocate inbufs in add_port() only if it is needed 2019-12-01 09:16:10 +01:00