drm/vc4: clean up error handling on devm_kzalloc failure

The current error handling when devm_kzalloc fails performs a
non-null check on connector which is redundant because connector
is null at that failure point.  Once this is removed, make the
failure path into a trivial -ENOMEM return to clean up the
error handling. Also remove need to initialize connector to NULL.

Detected by CoverityScan CID#1339527 ("Logically dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20170908140504.1340-1-colin.king@canonical.com

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 937da8d..fa37a1c 100644 (file)
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -309,16 +309,13 @@ static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs =
 static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
                                                     struct drm_encoder *encoder)
 {
-       struct drm_connector *connector = NULL;
+       struct drm_connector *connector;
        struct vc4_hdmi_connector *hdmi_connector;
-       int ret = 0;
 
        hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
                                      GFP_KERNEL);
-       if (!hdmi_connector) {
-               ret = -ENOMEM;
-               goto fail;
-       }
+       if (!hdmi_connector)
+               return ERR_PTR(-ENOMEM);
        connector = &hdmi_connector->base;
 
        hdmi_connector->encoder = encoder;
@@ -336,12 +333,6 @@ static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
        drm_mode_connector_attach_encoder(connector, encoder);
 
        return connector;
-
- fail:
-       if (connector)
-               vc4_hdmi_connector_destroy(connector);
-
-       return ERR_PTR(ret);
 }
 
 static void vc4_hdmi_encoder_destroy(struct drm_encoder *encoder)