[PATCH 47/50] drm: rip out dev->ioctl_count tracking

[Daniel Vetter]

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 at ffwll.ch>
---
 drivers/gpu/drm/drm_drv.c  | 2 --
 drivers/gpu/drm/drm_fops.c | 8 +-------
 include/drm/drmP.h         | 1 -
 3 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index d9137e49c4e8..9fd4dd476d33 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -315,7 +315,6 @@ long drm_ioctl(struct file *filp,
 	if (drm_device_is_unplugged(dev))
 		return -ENODEV;
 
-	atomic_inc(&dev->ioctl_count);
 	++file_priv->ioctl_count;
 
 	if ((nr >= DRM_CORE_IOCTL_COUNT) &&
@@ -410,7 +409,6 @@ long drm_ioctl(struct file *filp,
 
 	if (kdata != stack_kdata)
 		kfree(kdata);
-	atomic_dec(&dev->ioctl_count);
 	if (retcode)
 		DRM_DEBUG("ret = %d\n", retcode);
 	return retcode;
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);
 	}
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 610eb5c221c4..2644ba1564eb 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1073,7 +1073,6 @@ struct drm_device {
 	/** \name Usage Counters */
 	/*@{ */
 	int open_count;			/**< Outstanding files open, protected by drm_global_lock. */
-	atomic_t ioctl_count;		/**< Outstanding IOCTLs pending */
 	atomic_t vma_count;		/**< Outstanding vma areas open */
 	spinlock_t buf_lock;		/**< For drm_device::buf_use and a few other things. */
 	int buf_use;			/**< Buffers in use -- cannot alloc */
-- 
1.8.4.3