linux/include
Rob Clark 86de88cfeb drm/atomic: fix self-refresh helpers crtc state dereference
drm_self_refresh_helper_update_avg_times() was incorrectly accessing the
new incoming state after drm_atomic_helper_commit_hw_done().  But this
state might have already been superceeded by an !nonblock atomic update
resulting in dereferencing an already free'd crtc_state.

TODO I *think* this will more or less do the right thing.. althought I'm
not 100% sure if, for example, we enter psr in a nonblock commit, and
then leave psr in a !nonblock commit that overtakes the completion of
the nonblock commit.  Not sure if this sort of scenario can happen in
practice.  But not crashing is better than crashing, so I guess we
should either take this patch or rever the self-refresh helpers until
Sean can figure out a better solution.

Fixes: d4da4e3334 ("drm: Measure Self Refresh Entry/Exit times to avoid thrashing")
Cc: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
[seanpaul fixed up some checkpatch warns]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191104173737.142558-1-robdclark@gmail.com
2019-11-06 13:00:21 -05:00
..
acpi ACPI updates for 5.4-rc1 2019-09-17 19:31:36 -07:00
asm-generic Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
clocksource
crypto Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity 2019-09-27 19:37:27 -07:00
drm drm/atomic: fix self-refresh helpers crtc state dereference 2019-11-06 13:00:21 -05:00
dt-bindings Main MIPS changes for v5.4: 2019-09-22 09:30:30 -07:00
keys
kvm
linux libnvdimm fixes v5.4-rc1 2019-09-29 10:33:41 -07:00
math-emu
media
misc
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2019-09-27 20:15:00 +02:00
pcmcia
ras
rdma RDMA subsystem updates for 5.4 2019-09-21 10:26:24 -07:00
scsi SCSI misc on 20190919 2019-09-21 10:50:15 -07:00
soc Char/Misc driver patches for 5.4-rc1 2019-09-18 11:14:31 -07:00
sound ASoC: Updates for v5.4 2019-09-10 13:03:08 +02:00
target
trace A few more tracing fixes: 2019-09-30 09:29:53 -07:00
uapi Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-09-28 17:47:33 -07:00
vdso
video
xen swiotlb-xen: simplify cache maintainance 2019-09-11 12:43:27 +02:00
Kbuild - New Drivers 2019-09-23 19:37:49 -07:00