renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-27 06:34:11 +08:00
Code

drm/i915/perf: ensure we keep a reference on the driver

Browse Source 
The i915 perf stream has its own file descriptor and is tied to
reference of the driver. We haven't taken care of keep the driver
alive.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: eec688e142 ("drm/i915: Add i915 perf infrastructure")
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190709123351.5645-2-lionel.g.landwerlin@intel.com
This commit is contained in:
Lionel Landwerlin 2019-07-09 15:33:39 +03:00 committed by Chris Wilson
parent 681c774d34
commit a5af1df716
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/i915/i915_perf.c
View File

@ -2517,6 +2517,9 @@ static int i915_perf_release(struct inode *inode, struct file *file)
i915_perf_destroy_locked(stream);
mutex_unlock(&dev_priv->perf.lock);
/* Release the reference the perf stream kept on the driver. */
drm_dev_put(&dev_priv->drm);
return 0;
}
@ -2652,6 +2655,11 @@ i915_perf_open_ioctl_locked(struct drm_i915_private *dev_priv,
if (!(param->flags & I915_PERF_FLAG_DISABLED))
i915_perf_enable_locked(stream);
/* Take a reference on the driver that will be kept with stream_fd
* until its release.
*/
drm_dev_get(&dev_priv->drm);
return stream_fd;
err_open: