[PATCH] lib/test_hmm: fix error path in dmirror_devmem_fault()

[liuqiangneo]

From: Qiang Liu <liuqiang@xxxxxxxxxx>

Handle migrate_vma_setup() failure via goto err for unified cleanup.

Signed-off-by: Qiang Liu <liuqiang@xxxxxxxxxx>
---
 lib/test_hmm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 213504915737..5430ef97bbe0 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -1679,8 +1679,10 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf)
 	if (order)
 		args.flags |= MIGRATE_VMA_SELECT_COMPOUND;
 
-	if (migrate_vma_setup(&args))
-		return VM_FAULT_SIGBUS;
+	if (migrate_vma_setup(&args)) {
+		ret = VM_FAULT_SIGBUS;
+		goto err;
+	}
 
 	ret = dmirror_devmem_fault_alloc_and_copy(&args, dmirror);
 	if (ret)
-- 
2.43.0