[PATCH] drm/msm/disp/dpu: fix early dereference of physical encoder

[PATCH] drm/msm/disp/dpu: fix early dereference of physical encoder

[Jeykumar Sankaran]

This change validates the physical encoder before it
is dereferenced.

Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 0922d35..1b4de34 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2444,6 +2444,8 @@ int dpu_encoder_wait_for_event(struct drm_encoder *drm_enc,
 
 	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
 		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
+		if (!phys)
+			continue;
 
 		switch (event) {
 		case MSM_ENC_COMMIT_DONE:
@@ -2461,7 +2463,7 @@ int dpu_encoder_wait_for_event(struct drm_encoder *drm_enc,
 			return -EINVAL;
 		};
 
-		if (phys && fn_wait) {
+		if (fn_wait) {
 			DPU_ATRACE_BEGIN("wait_for_completion_event");
 			ret = fn_wait(phys);
 			DPU_ATRACE_END("wait_for_completion_event");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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