[PATCH 3/5] drm/xe: Take a reference to xe file when user creates exec_queue

[Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>]

Take a reference to xe file object when user creates an exec queue so
that the xe file object is available for the lifetime of the queue.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/xe/xe_exec_queue.c       | 6 ++++++
 drivers/gpu/drm/xe/xe_exec_queue_types.h | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index 0ba37835849b..b01eccdd75ba 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -37,6 +37,10 @@ static void __xe_exec_queue_free(struct xe_exec_queue *q)
 {
 	if (q->vm)
 		xe_vm_put(q->vm);
+
+	if (q->xef)
+		xe_file_put(q->xef);
+
 	kfree(q);
 }
 
@@ -640,6 +644,8 @@ int xe_exec_queue_create_ioctl(struct drm_device *dev, void *data,
 			if (XE_IOCTL_DBG(xe, err))
 				goto put_exec_queue;
 		}
+
+		q->xef = xe_file_get(xef);
 	}
 
 	mutex_lock(&xef->exec_queue.lock);
diff --git a/drivers/gpu/drm/xe/xe_exec_queue_types.h b/drivers/gpu/drm/xe/xe_exec_queue_types.h
index ded9f9396429..f768e48f31e4 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue_types.h
+++ b/drivers/gpu/drm/xe/xe_exec_queue_types.h
@@ -38,6 +38,9 @@ enum xe_exec_queue_priority {
  * a kernel object.
  */
 struct xe_exec_queue {
+	/** @xef: Back pointer to xe file is this is user created exec queue */
+	struct xe_file *xef;
+
 	/** @gt: graphics tile this exec queue can submit to */
 	struct xe_gt *gt;
 	/**
-- 
2.38.1