[PATCH 2/8] drm: WARN() when drm_connector_attach_property fails

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

Also return void instead of int. We have more than 100 callers and
no one checks for the return value.

If this function fails the property won't be exposed by the get/set
ioctls, but we should probably survive. If this starts happening,
the solution will be to increase DRM_CONNECTOR_MAX_PROPERTY and
recompile the Kernel.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/drm_crtc.c |    8 +++-----
 include/drm/drm_crtc.h     |    4 ++--
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 2e9cfb5..e3a5b0e 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2778,7 +2778,7 @@ void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
 }
 EXPORT_SYMBOL(drm_property_destroy);
 
-int drm_connector_attach_property(struct drm_connector *connector,
+void drm_connector_attach_property(struct drm_connector *connector,
 			       struct drm_property *property, uint64_t init_val)
 {
 	int i;
@@ -2787,13 +2787,11 @@ int drm_connector_attach_property(struct drm_connector *connector,
 		if (connector->property_ids[i] == 0) {
 			connector->property_ids[i] = property->base.id;
 			connector->property_values[i] = init_val;
-			break;
+			return;
 		}
 	}
 
-	if (i == DRM_CONNECTOR_MAX_PROPERTY)
-		return -EINVAL;
-	return 0;
+	WARN(1, "Failed to attach connector property\n");
 }
 EXPORT_SYMBOL(drm_connector_attach_property);
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index e250eda..c3d429a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -910,8 +910,8 @@ extern int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb);
 extern void drm_crtc_probe_connector_modes(struct drm_device *dev, int maxX, int maxY);
 extern bool drm_crtc_in_use(struct drm_crtc *crtc);
 
-extern int drm_connector_attach_property(struct drm_connector *connector,
-				      struct drm_property *property, uint64_t init_val);
+extern void drm_connector_attach_property(struct drm_connector *connector,
+					  struct drm_property *property, uint64_t init_val);
 extern struct drm_property *drm_property_create(struct drm_device *dev, int flags,
 						const char *name, int num_values);
 extern struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
-- 
1.7.9.1