[Intel-xe] [PATCH v2 7/8] drm/xe: Only try to lock external BOs in VM bind

[Christopher Snowhill <kode54@gmail.com>]

From: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>

We only need to try to lock a BO if it's external as non-external BOs
share the dma-resv with the already locked VM. Trying to lock
non-external BOs caused an issue (list corruption) in an uncoming patch
which adds bulk LRU move. Since this code isn't needed, remove it.

v2: New commit message, s/mattthew/matthew/

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index a0306526b269..0398da1ef1e2 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2089,9 +2089,11 @@ static int vm_bind_ioctl(struct xe_vm *vm, struct xe_vma *vma,
 		 */
 		xe_bo_get(vbo);
 
-		tv_bo.bo = &vbo->ttm;
-		tv_bo.num_shared = 1;
-		list_add(&tv_bo.head, &objs);
+		if (!vbo->vm) {
+			tv_bo.bo = &vbo->ttm;
+			tv_bo.num_shared = 1;
+			list_add(&tv_bo.head, &objs);
+		}
 	}
 
 again:
-- 
2.40.1