drm: Warn when leaking flip events on close

Warn when there are events on the file_priv->event_list just before
file_priv gets freed. This can occur if the driver doesn't clean up
pending page flip events in ->preclose().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 8f91062db5b668f54d52e99afec510b24c990c88..0fa4dadac4c6ed552181d1d9079630fbb9834a88 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -529,6 +529,8 @@ int drm_release(struct inode *inode, struct file *filp)
        if (drm_core_check_feature(dev, DRIVER_PRIME))
                drm_prime_destroy_file_private(&file_priv->prime);
 
+       WARN_ON(!list_empty(&file_priv->event_list));
+
        put_pid(file_priv->pid);
        kfree(file_priv);