drm/xe: Ensure all locks released in exec IOCTL

In couple of places the wrong error handling goto was used to release
locks. Fix these to ensure all locks dropped on exec IOCTL errors.

Cc: Francois Dugast <[email protected]>
Fixes: d16ef1a ("drm/xe/exec: Switch hw engine group execution mode upon job submission")
Signed-off-by: Matthew Brost <[email protected]>
Reviewed-by: Francois Dugast <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 9e7aacd)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: mbrost05

drivers/gpu/drm/xe/xe_exec.c

@@ -203,14 +203,14 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 		write_locked = false;
 	}
 	if (err)
-		goto err_syncs;
+		goto err_hw_exec_mode;
 
 	if (write_locked) {
 		err = xe_vm_userptr_pin(vm);
 		downgrade_write(&vm->lock);
 		write_locked = false;
 		if (err)
-			goto err_hw_exec_mode;
+			goto err_unlock_list;
 	}
 
 	if (!args->num_batch_buffer) {