Commit f0584be5 authored by Charlene Liu's avatar Charlene Liu Committed by Alex Deucher
Browse files

drm/amd/display: add NULL pointer check 



[Why]
In virtual link use case, link->ddc could be NULL.

[How]
Add null pointer check to avoid undefined behavior.

Reviewed-by: default avatarMartin Leung <Martin.Leung@amd.com>
Reviewed-by: default avatarHansen Dsouza <hansen.dsouza@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ed6941b6

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

+10 −6
Original line number Diff line number Diff line
@@ -3223,13 +3223,17 @@ static void dcn10_config_stereo_parameters( 
			timing_3d_format == TIMING_3D_FORMAT_INBAND_FA ||

			timing_3d_format == TIMING_3D_FORMAT_DP_HDMI_INBAND_FA ||

			timing_3d_format == TIMING_3D_FORMAT_SIDEBAND_FA) {



			if (stream->link && stream->link->ddc) {

				enum display_dongle_type dongle = \

						stream->link->ddc->dongle_type;



				if (dongle == DISPLAY_DONGLE_DP_VGA_CONVERTER ||

					dongle == DISPLAY_DONGLE_DP_DVI_CONVERTER ||

					dongle == DISPLAY_DONGLE_DP_HDMI_CONVERTER)

					flags->DISABLE_STEREO_DP_SYNC = 1;

			}

		}

		flags->RIGHT_EYE_POLARITY =\

				stream->timing.flags.RIGHT_EYE_3D_POLARITY;

		if (timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)