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| author | Alex Hung <alex.hung@amd.com> | 2024-11-26 19:23:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-09 10:31:41 +0100 |
| commit | c3a3b6d9a9383e3c1a4a08878ba5046e68647595 (patch) | |
| tree | 2e3b67988764ef8ef29322c09f5dd5f094ebaa14 /drivers | |
| parent | e0f6ee75f50476607ca82fc7c3711c795ce09b52 (diff) | |
| download | linux-c3a3b6d9a9383e3c1a4a08878ba5046e68647595.tar.gz linux-c3a3b6d9a9383e3c1a4a08878ba5046e68647595.tar.bz2 linux-c3a3b6d9a9383e3c1a4a08878ba5046e68647595.zip | |
drm/amd/display: Check null-initialized variables
[ Upstream commit 367cd9ceba1933b63bc1d87d967baf6d9fd241d2 ]
[WHAT & HOW]
drr_timing and subvp_pipe are initialized to null and they are not
always assigned new values. It is necessary to check for null before
dereferencing.
This fixes 2 FORWARD_NULL issues reported by Coverity.
Reviewed-by: Nevenko Stupar <nevenko.stupar@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c index 3d82cbef1274..ac6357c089e7 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c @@ -932,8 +932,9 @@ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context) * for VBLANK: (VACTIVE region of the SubVP pipe can fit the MALL prefetch, VBLANK frame time, * and the max of (VBLANK blanking time, MALL region)). */ - if (stretched_drr_us < (1 / (double)drr_timing->min_refresh_in_uhz) * 1000000 * 1000000 && - subvp_active_us - prefetch_us - stretched_drr_us - max_vblank_mallregion > 0) + if (drr_timing && + stretched_drr_us < (1 / (double)drr_timing->min_refresh_in_uhz) * 1000000 * 1000000 && + subvp_active_us - prefetch_us - stretched_drr_us - max_vblank_mallregion > 0) schedulable = true; return schedulable; @@ -995,7 +996,7 @@ static bool subvp_vblank_schedulable(struct dc *dc, struct dc_state *context) if (!subvp_pipe && pipe->stream->mall_stream_config.type == SUBVP_MAIN) subvp_pipe = pipe; } - if (found) { + if (found && subvp_pipe) { main_timing = &subvp_pipe->stream->timing; phantom_timing = &subvp_pipe->stream->mall_stream_config.paired_stream->timing; vblank_timing = &context->res_ctx.pipe_ctx[vblank_index].stream->timing; |