| Message ID | 20240117194109.21609-1-quic_abhinavk@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | drm/msm/dpu: check for valid hw_pp in dpu_encoder_helper_phys_cleanup | expand |
On Wed, 17 Jan 2024 at 21:41, Abhinav Kumar <quic_abhinavk@quicinc.com> wrote: > > The commit 8b45a26f2ba9 ("drm/msm/dpu: reserve cdm blocks for writeback > in case of YUV output") introduced a smatch warning about another > conditional block in dpu_encoder_helper_phys_cleanup() which had assumed > hw_pp will always be valid which may not necessarily be true. > > Lets fix the other conditional block by making sure hw_pp is valid > before dereferencing it. > > Reported-by: Dan Carpenter <dan.carpenter@linaro.org> > Fixes: ae4d721ce100 ("drm/msm/dpu: add an API to reset the encoder related hw blocks") > Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 83380bc92a00..282d84c872f2 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -2072,7 +2072,7 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc) } /* reset the merge 3D HW block */ - if (phys_enc->hw_pp->merge_3d) { + if (phys_enc->hw_pp && phys_enc->hw_pp->merge_3d) { phys_enc->hw_pp->merge_3d->ops.setup_3d_mode(phys_enc->hw_pp->merge_3d, BLEND_3D_NONE); if (phys_enc->hw_ctl->ops.update_pending_flush_merge_3d) @@ -2103,7 +2103,7 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc) if (phys_enc->hw_wb) intf_cfg.wb = phys_enc->hw_wb->idx; - if (phys_enc->hw_pp->merge_3d) + if (phys_enc->hw_pp && phys_enc->hw_pp->merge_3d) intf_cfg.merge_3d = phys_enc->hw_pp->merge_3d->idx; if (ctl->ops.reset_intf_cfg)
The commit 8b45a26f2ba9 ("drm/msm/dpu: reserve cdm blocks for writeback in case of YUV output") introduced a smatch warning about another conditional block in dpu_encoder_helper_phys_cleanup() which had assumed hw_pp will always be valid which may not necessarily be true. Lets fix the other conditional block by making sure hw_pp is valid before dereferencing it. Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Fixes: ae4d721ce100 ("drm/msm/dpu: add an API to reset the encoder related hw blocks") Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)