From 02367f52901932674ff2a9c5208b6c11ccf39802 Mon Sep 17 00:00:00 2001 From: Wenjing Liu Date: Tue, 12 Mar 2024 15:31:59 -0400 Subject: drm/amd/display: fix a dereference of a NULL pointer [why&how] In some platform out_transfer_func may not be popualted. We need to check for null before dereferencing it. Fixes: d2dea1f14038 ("drm/amd/display: Generalize new minimal transition path") Reviewed-by: Alvin Lee Acked-by: Tom Chung Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm') diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 9030251388db..8d042651b6fe 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -3057,7 +3057,8 @@ static void backup_planes_and_stream_state( scratch->blend_tf[i] = *status->plane_states[i]->blend_tf; } scratch->stream_state = *stream; - scratch->out_transfer_func = *stream->out_transfer_func; + if (stream->out_transfer_func) + scratch->out_transfer_func = *stream->out_transfer_func; } static void restore_planes_and_stream_state( @@ -3079,7 +3080,8 @@ static void restore_planes_and_stream_state( *status->plane_states[i]->blend_tf = scratch->blend_tf[i]; } *stream = scratch->stream_state; - *stream->out_transfer_func = scratch->out_transfer_func; + if (stream->out_transfer_func) + *stream->out_transfer_func = scratch->out_transfer_func; } /** -- cgit v1.2.3-70-g09d2