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drm/amd/display: Added local_sink null check before access 

[Why & How]
Need to check if local_sink is NULL before accessing.

Signed-off-by: Jake Wang <haonan.wang2@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jake Wang 2020-06-05 16:16:38 -04:00 committed by Alex Deucher
parent 8c44515be1
commit 3e1974cf02
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
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@ -167,7 +167,8 @@ bool edp_receiver_ready_T9(struct dc_link *link)
} while (++tries < 50);
}
if (link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0)
if (link->local_sink &&
link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0)
udelay(link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off * 1000);
return result;
@ -201,7 +202,8 @@ bool edp_receiver_ready_T7(struct dc_link *link)
} while (time_taken_in_ns < 50 * 1000000); //MAx T7 is 50ms
}
if (link->local_sink->edid_caps.panel_patch.extra_t7_ms > 0)
if (link->local_sink &&
link->local_sink->edid_caps.panel_patch.extra_t7_ms > 0)
udelay(link->local_sink->edid_caps.panel_patch.extra_t7_ms * 1000);
return result;