[PATCH v2 41/41] drm: renesas: shmobile: remove now-redundant call to drm_connector_attach_encoder()

[Luca Ceresoli]

shmob_drm_connector_create() can init the connector in two ways, based on
the 'if (sdev->pdata)':

 1. manually in shmob_drm_connector_create(), or
 2. delegating to drm_bridge_connector_init()

Whichever branch is taken, drm_connector_attach_encoder() is called
immediately after to attach the connector to the encoder.

Now drm_bridge_connector_init() calls drm_connector_attach_encoder() on the
connector so it is not needed anymore in case 2 and should be removed, but
it is still needed in case 1. Move drm_connector_attach_encoder() from the
common path to inside shmob_drm_connector_create() in order to get back to
a single drm_connector_attach_encoder() in both cases.

Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>

---

Changes in v2:
- rewrote completely, fixing potential ERR_PTR deref and ending up with
  a cleaner patch
- also wrote more extensive commit message
---
 .../gpu/drm/renesas/shmobile/shmob_drm_crtc.c    | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
index 5f460b38596c..815c770147ed 100644
--- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
+++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
@@ -583,6 +583,13 @@ shmob_drm_connector_init(struct shmob_drm_device *sdev,
 
 	drm_connector_helper_add(connector, &connector_helper_funcs);
 
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret < 0) {
+		drm_connector_cleanup(connector);
+		kfree(scon);
+		return ERR_PTR(ret);
+	}
+
 	return connector;
 }
 
@@ -594,7 +601,6 @@ int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 			       struct drm_encoder *encoder)
 {
 	struct drm_connector *connector;
-	int ret;
 
 	if (sdev->pdata)
 		connector = shmob_drm_connector_init(sdev, encoder);
@@ -606,17 +612,9 @@ int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 		return PTR_ERR(connector);
 	}
 
-	ret = drm_connector_attach_encoder(connector, encoder);
-	if (ret < 0)
-		goto error;
-
 	connector->dpms = DRM_MODE_DPMS_OFF;
 
 	sdev->connector = connector;
 
 	return 0;
-
-error:
-	drm_connector_cleanup(connector);
-	return ret;
 }
-- 
2.53.0