diff options
| author | Alex Hung <alex.hung@amd.com> | 2024-06-28 01:45:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-10 13:01:14 +0300 |
| commit | df8d896f8f94f96c54d5cc798fafd209d830f40d (patch) | |
| tree | f37c7a21d19238c9d21a783c872abe51ec5aebc9 | |
| parent | e34ddcce006633a661e08020147a09424a5ba41f (diff) | |
| download | linux-df8d896f8f94f96c54d5cc798fafd209d830f40d.tar.xz | |
drm/amd/display: enable_hpo_dp_link_output: Check link_res->hpo_dp_link_enc before using it
commit d925c04d974c657d10471c0c2dba3bc9c7d994ee upstream.
[WHAT & HOW]
Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res
without initializing hpo_dp_link_enc and it is necessary to check for
null before dereferencing.
This fixes 1 FORWARD_NULL issue reported by Coverity.
Fixes: 0beca868cde8 ("drm/amd/display: Check link_res->hpo_dp_link_enc before using it")
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c index d0148f10dfc0..cec68c5dba13 100644 --- a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c +++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c @@ -110,6 +110,11 @@ void enable_hpo_dp_link_output(struct dc_link *link, enum clock_source_id clock_source, const struct dc_link_settings *link_settings) { + if (!link_res->hpo_dp_link_enc) { + DC_LOG_ERROR("%s: invalid hpo_dp_link_enc\n", __func__); + return; + } + if (link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating) link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating( link->dc->res_pool->dccg, |