drm/vc4: Fix race between page flip completion event and clean-up

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commit 26fc78f6fe upstream.

There was a small window where a userspace program could submit
a pageflip after receiving a pageflip completion event yet still
receive EBUSY.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Derek Foreman 2016-11-24 12:11:55 -06:00 • committed by Greg Kroah-Hartman

parent f4d40cfd61

commit 6b33067067

3 changed files with 34 additions and 8 deletions

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8

drivers/gpu/drm/vc4/vc4_crtc.c

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1

drivers/gpu/drm/vc4/vc4_drv.h

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33

drivers/gpu/drm/vc4/vc4_kms.c

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