[PATCH v4 8/9] drm/xe: Handle xe_work_period destruction

[Aakash Deep Sarkar <aakash.deep.sarkar@intel.com>]

This adds the xe_work_period destruction procedure.
We iterate over all entries in the xe::work_period::users
xarray and cancel any pending delayed work. Then destroy
the xarray itself.

Signed-off-by: Aakash Deep Sarkar <aakash.deep.sarkar@intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index c34da72e5c9a..e270f57a9750 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -419,6 +419,8 @@ static struct drm_driver driver = {
 static void xe_device_destroy(struct drm_device *dev, void *dummy)
 {
 	struct xe_device *xe = to_xe_device(dev);
+	struct xe_user *user = NULL;
+	unsigned long i;
 
 	xe_bo_dev_fini(&xe->bo_device);
 
@@ -434,6 +436,15 @@ static void xe_device_destroy(struct drm_device *dev, void *dummy)
 	if (xe->destroy_wq)
 		destroy_workqueue(xe->destroy_wq);
 
+
+	mutex_lock(&xe->work_period.lock);
+	xa_for_each(&xe->work_period.users, i, user) {
+		if (cancel_delayed_work_sync(&user->delay_work))
+			xe_user_put(user);
+	}
+	xa_destroy(&xe->work_period.users);
+	mutex_unlock(&xe->work_period.lock);
+
 	ttm_device_fini(&xe->ttm);
 }
 
-- 
2.49.0