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drm/amd/display: Fix null check for pipe_ctx->plane_state in hwss_setup_dpp

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[ Upstream commit 2bc96c95070571c6c824e0d4c7783bee25a37876 ]

This commit addresses a null pointer dereference issue in
hwss_setup_dpp(). The issue could occur when pipe_ctx->plane_state is
null. The fix adds a check to ensure `pipe_ctx->plane_state` is not null
before accessing. This prevents a null pointer dereference.

Fixes: 0baae62463 ("drm/amd/display: Refactor fast update to use new HWSS build sequence")
Reviewed-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Zicheng Qu <quzicheng@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zicheng Qu
2024-11-05 14:01:37 +00:00
committed by Greg Kroah-Hartman
parent 756f30dc27
commit 020002c761
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c
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@@ -727,6 +727,9 @@ void hwss_setup_dpp(union block_sequence_params *params)
struct dpp *dpp = pipe_ctx->plane_res.dpp;
struct dc_plane_state *plane_state = pipe_ctx->plane_state;
if (!plane_state)
return;
if (dpp && dpp->funcs->dpp_setup) {
// program the input csc
dpp->funcs->dpp_setup(dpp,