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drm/amd/display: Add null pointer check in link_dpms

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[why]
Check that the stream exists to add link->local_sink null pointer access
protection.

Reviewed-by: Harold Sun <harold.sun@amd.com>
Reviewed-by: Ethan Cheung <ethan.cheung@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu
2025-11-06 18:10:30 -05:00
committed by Alex Deucher
parent 79b3c037f9
commit 8ffa289f90
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/display/dc/link/link_dpms.c
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@@ -2226,7 +2226,11 @@ static enum dc_status enable_link(
{
enum dc_status status = DC_ERROR_UNEXPECTED;
struct dc_stream_state *stream = pipe_ctx->stream;
struct dc_link *link = stream->link;
struct dc_link *link = NULL;
if (stream == NULL)
return DC_ERROR_UNEXPECTED;
link = stream->link;
/* There's some scenarios where driver is unloaded with display
* still enabled. When driver is reloaded, it may cause a display