From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Wed, 6 Aug 2014 11:02:50 +0000 (+0300)
Subject: drm: Warn when leaking flip events on close
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ddde43711fdde505ac413102faa2352704cd858a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 8f91062db5b6..0fa4dadac4c6 100644
--- 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);