@@ -1667,7 +1667,7 @@ static void _dpu_encoder_trigger_flush(struct drm_encoder *drm_enc,
*/
static void _dpu_encoder_trigger_start(struct dpu_encoder_phys *phys)
{
- struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(phys->parent);
+ struct dpu_encoder_virt *dpu_enc;
if (!phys) {
DPU_ERROR("invalid argument(s)\n");
@@ -1678,6 +1678,8 @@ static void _dpu_encoder_trigger_start(struct dpu_encoder_phys *phys)
DPU_ERROR("invalid pingpong hw\n");
return;
}
+
+ dpu_enc = to_dpu_encoder_virt(phys->parent);
if (phys->parent->encoder_type == DRM_MODE_ENCODER_VIRTUAL &&
dpu_enc->cwb_mask) {
_dpu_encoder_trigger_start dereferences "struct dpu_encoder_phys *phys" before the sanity checks which can lead to a NULL pointer dereference if phys is NULL. Fix this by reordering the dereference after the sanity checks. Fixes: 8144d17a81d9 ("drm/msm/dpu: Skip trigger flush and start for CWB") Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Qasim Ijaz <qasdev00@gmail.com> --- v2: - Moved Signed-off tag below Fixes tag - Moved dpu_enc declaration to the top and initialisation below sanity checks drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)