diff options
| author | Mikita Lipski <mikita.lipski@amd.com> | 2021-11-15 22:07:38 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-12-09 05:24:08 +0100 |
| commit | 0755c38eb007196a5f779298b4a5f46c4eec41d2 (patch) | |
| tree | 0b448db4131dc6b4bab4871d962d7f76a7275bfe /drivers/gpu | |
| parent | drm/amd/display: Fix DPIA outbox timeout after S3/S4/reset (diff) | |
| download | linux-0755c38eb007196a5f779298b4a5f46c4eec41d2.tar.xz linux-0755c38eb007196a5f779298b4a5f46c4eec41d2.zip | |
drm/amd/display: prevent reading unitialized links
[why/how]
The function can be called on boot or after suspend when
links are not initialized, to prevent it guard it with
NULL pointer check
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index b01077a6af0e..fad3d883ed89 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -226,6 +226,8 @@ static inline void get_edp_links(const struct dc *dc, *edp_num = 0; for (i = 0; i < dc->link_count; i++) { // report any eDP links, even unconnected DDI's + if (!dc->links[i]) + continue; if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP) { edp_links[*edp_num] = dc->links[i]; if (++(*edp_num) == MAX_NUM_EDP) |