[PATCH 1/1] net/rds: Use "unpin_user_page" as "pin_user_pages" counterpart

[Gerd Rausch <gerd.rausch@oracle.com>]

In cases where "pin_user_pages" was used to obtain longerm references,
the pages must be released with "unpin_user_pages".

Fixes: 0d4597c8c5ab ("net/rds: Track user mapped pages through special API")
Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
---
 net/rds/ib_rdma.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 8f070ee7e742..9d86d6db98c4 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -256,8 +256,7 @@ void __rds_ib_teardown_mr(struct rds_ib_mr *ibmr)
 			/* FIXME we need a way to tell a r/w MR
 			 * from a r/o MR */
 			WARN_ON(!page->mapping && irqs_disabled());
-			set_page_dirty(page);
-			put_page(page);
+			unpin_user_pages_dirty_lock(&page, 1, true);
 		}
 		kfree(ibmr->sg);