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| author | Chris Wilson <[email protected]> | 2016-08-04 08:09:53 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2016-08-04 10:18:22 +0000 |
| commit | 1dd5b6f2020389e75bb3d269c038497f065e68c9 (patch) | |
| tree | a0d5389664a6488127eb778ceb9648c78bd547b9 /drivers/gpu/drm/i915/intel_dp_mst.c | |
| parent | drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake (diff) | |
| download | kernel-1dd5b6f2020389e75bb3d269c038497f065e68c9.tar.gz kernel-1dd5b6f2020389e75bb3d269c038497f065e68c9.zip | |
drm/i915: Add missing rpm wakelock to GGTT pread
Joonas spotted a discrepancy between the pwrite and pread ioctls, in
that pwrite takes the rpm wakelock around its GGTT access, The wakelock
is required in order for the GTT to function. In disregard for the
current convention, we take the rpm wakelock around the access itself
rather than around the struct_mutex as the nesting is not strictly
required and such ordering will one day be fixed by explicitly noting
the barrier dependencies between the GGTT and rpm.
Fixes: b50a53715f09 ("drm/i915: Support for pread/pwrite ...")
Reported-by: Joonas Lahtinen <[email protected]>
Signed-off-by: Chris Wilson <[email protected]>
Cc: Ankitprasad Sharma <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: [email protected]
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Joonas Lahtinen <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp_mst.c')
0 files changed, 0 insertions, 0 deletions