From: Jessica Zhang <quic_jesszhan@quicinc.com>
Date: Tue, 21 Feb 2023 18:42:54 +0000 (-0800)
Subject: drm/msm: Check for NULL before calling prepare_commit()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=078f6ec8657db604a1620da6698fb236e9b96bec;p=linux.git

drm/msm: Check for NULL before calling prepare_commit()

Add a NULL check before calling prepare_commit() in
msm_atomic_commit_tail()

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Patchwork: https://patchwork.freedesktop.org/patch/523604/
Link: https://lore.kernel.org/r/20230221184256.1436-3-quic_jesszhan@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index c5e71c05f038b..608a969efea21 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -205,7 +205,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	 * Now that there is no in-progress flush, prepare the
 	 * current update:
 	 */
-	kms->funcs->prepare_commit(kms, state);
+	if (kms->funcs->prepare_commit)
+		kms->funcs->prepare_commit(kms, state);
 
 	/*
 	 * Push atomic updates down to hardware: