drm: rip out dev->ioctl_count tracking

Now dev->ioctl_count tries to prevent the device from disappearing if
it's still in use. And if we'd actually need this code it would be
hopelessly racy and broken.

But luckily the vfs already takes care of this. So we can just rip it
out.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index c5b929c3f77a..97ebc828de5b 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -392,7 +392,6 @@ static void drm_legacy_dev_reinit(struct drm_device *dev)
         if (drm_core_check_feature(dev, DRIVER_MODESET))
                 return;
 
-        atomic_set(&dev->ioctl_count, 0);
         atomic_set(&dev->vma_count, 0);
 
         dev->sigdata.lock = NULL;
@@ -578,12 +577,7 @@ int drm_release(struct inode *inode, struct file *filp)
          */
 
         if (!--dev->open_count) {
-                if (atomic_read(&dev->ioctl_count)) {
-                        DRM_ERROR("Device busy: %d\n",
-                                  atomic_read(&dev->ioctl_count));
-                        retcode = -EBUSY;
-                } else
-                        retcode = drm_lastclose(dev);
+                retcode = drm_lastclose(dev);
                 if (drm_device_is_unplugged(dev))
                         drm_put_dev(dev);
         }