From: Alex Hung <[email protected]> [ 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 <[email protected]> Reviewed-by: Rodrigo Siqueira <[email protected]> Signed-off-by: Jerry Zuo <[email protected]> Signed-off-by: Alex Hung <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 7 ++++--- 1 file 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 ebcf5ece209a4..bf8c89fe95a7e 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 @@ -871,8 +871,9 @@ 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; @@ -937,7 +938,7 @@ static bool subvp_vblank_schedulable(struct dc *dc, struct dc_state *context) if (!subvp_pipe && pipe_mall_type == SUBVP_MAIN) subvp_pipe = pipe; } - if (found) { + if (found && subvp_pipe) { phantom_stream = dc_state_get_paired_subvp_stream(context, subvp_pipe->stream); main_timing = &subvp_pipe->stream->timing; phantom_timing = &phantom_stream->timing; -- 2.43.0
