drm/vc4: kms: Fix return code check

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commit f927767978 upstream.

The HVS global state functions return an error pointer, but in most
cases we check if it's NULL, possibly resulting in an invalid pointer
dereference.

Fixes: 9ec03d7f1e ("drm/vc4: kms: Wait on previous FIFO users before a commit")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Tested-by: Jian-Hong Pan <jhp@endlessos.org>
Link: https://lore.kernel.org/r/20211117094527.146275-3-maxime@cerno.tech
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Maxime Ripard 2021-11-17 10:45:23 +01:00 • committed by Greg Kroah-Hartman

parent fd7bfba011

commit b044180fcb

1 changed files with 5 additions and 5 deletions

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drivers/gpu/drm/vc4/vc4_kms.c

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