[PATCH] mm/migrate_device: fix double unlock

[Sunny Patel]

migrate_vma_collect_huge_pmd() calls spin_unlock(ptl) after
softleaf_entry_wait_on_locked(), which already releases the ptl.

Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages")

Cc: stable@xxxxxxxxxxxxxxx

Signed-off-by: Sunny Patel <nueralspacetech@xxxxxxxxx>
---
 mm/migrate_device.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 8079676c8f1f..7eb2f87ea39d 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -177,7 +177,6 @@ static int migrate_vma_collect_huge_pmd(pmd_t *pmdp, unsigned long start,
 
 		if (softleaf_is_migration(entry)) {
 			softleaf_entry_wait_on_locked(entry, ptl);
-			spin_unlock(ptl);
 			return -EAGAIN;
 		}
 
-- 
2.43.0