diff mbox series

[-next] drm/exynos: fix a potential error pointer dereference

Message ID 20230812062748.2223414-1-xiangyang@huaweicloud.com
State New
Headers show
Series [-next] drm/exynos: fix a potential error pointer dereference | expand

Commit Message

Xiang Yang Aug. 12, 2023, 6:27 a.m. UTC 
From: Xiang Yang <xiangyang3@huawei.com>

Smatch reports the warning below:
drivers/gpu/drm/exynos/exynos_hdmi.c:1864 hdmi_bind()
error: 'crtc' dereferencing possible ERR_PTR()

The return value of exynos_drm_crtc_get_by_type maybe ERR_PTR(-ENODEV),
which can not be used directly. Fix this by checking the return value
before using it.

Signed-off-by: Xiang Yang <xiangyang3@huawei.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index f3aaa4ea3e68..dd9903eab563 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1861,6 +1861,8 @@  static int hdmi_bind(struct device *dev, struct device *master, void *data)
 		return ret;
 
 	crtc = exynos_drm_crtc_get_by_type(drm_dev, EXYNOS_DISPLAY_TYPE_HDMI);
+	if (IS_ERR(crtc))
+		return PTR_ERR(crtc);
 	crtc->pipe_clk = &hdata->phy_clk;
 
 	ret = hdmi_create_connector(encoder);