[PATCH 2/2] drm/xlnx/zynqmp_dpsub: check return value on drm_encoder_init

[Diogo Silva <diogompaissilva@gmail.com>]

A call to drm_encoder_init() can fail. If the error code is not checked
this may lead to drm_encoder_cleanup() being called on an uninitialized
drm_encoder.
This patch addresses this by adding the proper return value check to the
drm_encoder_init() function call.

Signed-off-by: Diogo Silva <diogompaissilva@gmail.com>
---
 drivers/gpu/drm/xlnx/zynqmp_kms.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
index 698ac692abce..1d194c2824e3 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_kms.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
@@ -439,8 +439,13 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub)
 
 	/* Create the encoder and attach the bridge. */
 	encoder->possible_crtcs |= drm_crtc_mask(&dpsub->drm->crtc);
-	drm_encoder_init(&dpsub->drm->dev, encoder, &zynqmp_dpsub_encoder_funcs,
-			 DRM_MODE_ENCODER_NONE, NULL);
+	ret = drm_encoder_init(&dpsub->drm->dev, encoder,
+			       &zynqmp_dpsub_encoder_funcs,
+			       DRM_MODE_ENCODER_NONE, NULL);
+	if (ret) {
+		dev_err(dpsub->dev, "failed to initialize encoder\n");
+		return ret;
+	}
 
 	ret = drm_bridge_attach(encoder, dpsub->bridge, NULL,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);

-- 
2.51.2