drm: restore open_count if drm_setup fails
commit 0f1cb1bd94a9c967cd4ad3de51cfdabe61eb5dcc upstream.
If drm_setup (called at first open) fails, the whole
open call has failed, so we should not keep the
open_count incremented.
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 123de28..b90abff 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -139,8 +139,11 @@
retcode = drm_open_helper(inode, filp, dev);
if (!retcode) {
atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
- if (!dev->open_count++)
+ if (!dev->open_count++) {
retcode = drm_setup(dev);
+ if (retcode)
+ dev->open_count--;
+ }
}
if (!retcode) {
mutex_lock(&dev->struct_mutex);