drm/amd/display: Guard against null stream dereference in do flip

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[Why]

During suspend under some hardware configurations can result in a
series of atomic commits with a NULL stream status - which
causes a NULL pointer dereference. This should be guarded.

[How]

Exit early from the function - if we can't access the stream then
there isn't anything that can be done here.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Nicholas Kazlauskas 2018-09-11 14:29:47 -04:00 • committed by Alex Deucher

parent 99267ce71a

commit d999853e60

1 changed files with 14 additions and 1 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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