[PATCH 11/13] drm/irq: Document return values more consistently

[Thierry Reding]

From: Thierry Reding <treding at nvidia.com>

Some of the functions are documented inconsistently. Add Returns:
sections where missing and use consistent style to describe the return
value.

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 drivers/gpu/drm/drm_irq.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index b34900a8e172..ef5d993f06ee 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -991,6 +991,9 @@ EXPORT_SYMBOL(drm_crtc_send_vblank_event);
  * drm_vblank_enable - enable the vblank interrupt on a CRTC
  * @dev: DRM device
  * @pipe: CRTC index
+ *
+ * Returns:
+ * Zero on success or a negative error code on failure.
  */
 static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe)
 {
@@ -1035,7 +1038,7 @@ static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe)
  * This is the legacy version of drm_crtc_vblank_get().
  *
  * Returns:
- * Zero on success, nonzero on failure.
+ * Zero on success or a negative error code on failure.
  */
 int drm_vblank_get(struct drm_device *dev, unsigned int pipe)
 {
@@ -1072,7 +1075,7 @@ EXPORT_SYMBOL(drm_vblank_get);
  * This is the native kms version of drm_vblank_off().
  *
  * Returns:
- * Zero on success, nonzero on failure.
+ * Zero on success or a negative error code on failure.
  */
 int drm_crtc_vblank_get(struct drm_crtc *crtc)
 {
-- 
2.1.3