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drm: restore open_count if drm_setup fails 

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>
Cc: stable@vger.kernel.org
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ilija Hadzic 2012-10-29 17:35:00 +00:00 committed by Dave Airlie
parent 3d70f8c617
commit 0f1cb1bd94
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/drm_fops.c
View File

@ -135,8 +135,11 @@ int drm_open(struct inode *inode, struct file *filp)
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);