DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
task_pid_nr(current),
(long)old_encode_dev(file->minor->kdev->devt),
- dev->open_count);
+ READ_ONCE(dev->open_count));
if (drm_core_check_feature(dev, DRIVER_LEGACY) &&
dev->driver->preclose)
EXPORT_SYMBOL(drm_release);
/**
+ * drm_release_noglobal - release method for DRM file
+ * @inode: device inode
+ * @filp: file pointer.
+ *
+ * This function may be used by drivers as their &file_operations.release
+ * method. It frees any resources associated with the open file prior to taking
+ * the drm_global_mutex, which then calls the &drm_driver.postclose driver
+ * callback. If this is the last open file for the DRM device also proceeds to
+ * call the &drm_driver.lastclose driver callback.
+ *
+ * RETURNS:
+ *
+ * Always succeeds and returns 0.
+ */
+int drm_release_noglobal(struct inode *inode, struct file *filp)
+{
+ struct drm_file *file_priv = filp->private_data;
+ struct drm_minor *minor = file_priv->minor;
+ struct drm_device *dev = minor->dev;
+
+ drm_close_helper(filp);
+
+ mutex_lock(&drm_global_mutex);
+ if (!--dev->open_count)
+ drm_lastclose(dev);
+ mutex_unlock(&drm_global_mutex);
+
+ drm_minor_release(minor);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_release_noglobal);
+
+/**
* drm_read - read method for DRM file
* @filp: file pointer
* @buffer: userspace destination pointer for the read
static const struct file_operations i915_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
- .release = drm_release,
+ .release = drm_release_noglobal,
.unlocked_ioctl = drm_ioctl,
.mmap = i915_gem_mmap,
.poll = drm_poll,
ssize_t drm_read(struct file *filp, char __user *buffer,
size_t count, loff_t *offset);
int drm_release(struct inode *inode, struct file *filp);
+int drm_release_noglobal(struct inode *inode, struct file *filp);
__poll_t drm_poll(struct file *filp, struct poll_table_struct *wait);
int drm_event_reserve_init_locked(struct drm_device *dev,
struct drm_file *file_priv,