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drm/amd/display: prevent null pointer access

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Prevent null pointer access when checking odm tree.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: <stable@vger.kernel.org>
This commit is contained in:
Dmytro Laktyushkin 2020-10-15 14:49:56 -04:00 committed by Alex Deucher
parent 55bb919be4
commit 140b2ef1c2
1 changed files with 7 additions and 5 deletions
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12
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
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@ -2105,12 +2105,12 @@ static bool dcn30_internal_validate_bw(
if (split[i]) {
if (odm) {
if (split[i] == 4 && old_pipe->next_odm_pipe->next_odm_pipe)
if (split[i] == 4 && old_pipe->next_odm_pipe && old_pipe->next_odm_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->next_odm_pipe->pipe_idx;
else if (old_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->pipe_idx;
} else {
if (split[i] == 4 && old_pipe->bottom_pipe->bottom_pipe &&
if (split[i] == 4 && old_pipe->bottom_pipe && old_pipe->bottom_pipe->bottom_pipe &&
old_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
old_index = old_pipe->bottom_pipe->bottom_pipe->pipe_idx;
else if (old_pipe->bottom_pipe &&
@ -2150,10 +2150,12 @@ static bool dcn30_internal_validate_bw(
goto validate_fail;
newly_split[pipe_4to1->pipe_idx] = true;
if (odm && old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe)
if (odm && old_pipe->next_odm_pipe && old_pipe->next_odm_pipe->next_odm_pipe
&& old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe)
old_index = old_pipe->next_odm_pipe->next_odm_pipe->next_odm_pipe->pipe_idx;
else if (!odm && old_pipe->bottom_pipe->bottom_pipe->bottom_pipe &&
old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
else if (!odm && old_pipe->bottom_pipe && old_pipe->bottom_pipe->bottom_pipe &&
old_pipe->bottom_pipe->bottom_pipe->bottom_pipe &&
old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->plane_state == old_pipe->plane_state)
old_index = old_pipe->bottom_pipe->bottom_pipe->bottom_pipe->pipe_idx;
else
old_index = -1;