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[PATCHv4,1/3] drm/imx: parallel-display: check return code from of_get_drm_display_mode()

Message ID 1468330203-29150-2-git-send-email-LW@KARO-electronics.de (mailing list archive)
State New, archived
Headers show

Commit Message

Lothar Waßmann July 12, 2016, 1:30 p.m. UTC 
of_get_drm_display_mode() may fail. Check its return code and bail out
on error.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
---
 drivers/gpu/drm/imx/parallel-display.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 2d1fd02..4b2ec5d 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -69,10 +69,16 @@  static int imx_pd_connector_get_modes(struct drm_connector *connector)
 
 	if (np) {
 		struct drm_display_mode *mode = drm_mode_create(connector->dev);
+		int ret;
 
 		if (!mode)
 			return -EINVAL;
-		of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
+
+		ret = of_get_drm_display_mode(np, &imxpd->mode,
+					      OF_USE_NATIVE_MODE);
+		if (ret)
+			return ret;
+
 		drm_mode_copy(mode, &imxpd->mode);
 		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 		drm_mode_probed_add(connector, mode);