[PATCH 4/5] drm/xe: Take a ref to xe file when user creates a VM

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

Take a reference to xef when user creates the VM and put the reference
when user destroys the VM.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 0c764647a552..67b4c2467b78 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -1611,6 +1611,9 @@ static void vm_destroy_work_func(struct work_struct *w)
 		XE_WARN_ON(vm->pt_root[id]);
 
 	trace_xe_vm_free(vm);
+
+	if (vm->xef)
+		xe_file_put(vm->xef);
 	kfree(vm);
 }
 
@@ -1926,7 +1929,7 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
 	}
 
 	args->vm_id = id;
-	vm->xef = xef;
+	vm->xef = xe_file_get(xef);
 
 	/* Record BO memory for VM pagetable created against client */
 	for_each_tile(tile, xe, id)
-- 
2.38.1