Commit fe869c2e authored Mar 12, 2024 by Wenjing Liu Committed by Alex Deucher Mar 27, 2024

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: d2dea1f1 ("drm/amd/display: Generalize new minimal transition path")
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 25358e04

drivers/gpu/drm/amd/display/dc/core/dc.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -3024,6 +3024,7 @@ static void backup_planes_and_stream_state(
		scratch->blend_tf[i] = *status->plane_states[i]->blend_tf;
		}
		scratch->stream_state = *stream;
		if (stream->out_transfer_func)
		scratch->out_transfer_func = *stream->out_transfer_func;
		}

		@@ -3046,6 +3047,7 @@ static void restore_planes_and_stream_state(
		*status->plane_states[i]->blend_tf = scratch->blend_tf[i];
		}
		*stream = scratch->stream_state;
		if (stream->out_transfer_func)
		*stream->out_transfer_func = scratch->out_transfer_func;
		}