NFS: Fix memory leaks in nfs_pageio_stop_mirroring()

[ Upstream commit 862f35c94730c9270833f3ad05bd758a29f204ed ]

If we just set the mirror count to 1 without first clearing out
the mirrors, we can leak queued up requests.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 9cf59e2622f8e284d6cc85742eb0dc2ecd929ef5..5dae7c85d9b6ea680b0f3b24a286ca83fc5f7bd4 100644 (file)
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -865,15 +865,6 @@ static void nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
        pgio->pg_mirror_count = mirror_count;
 }
 
-/*
- * nfs_pageio_stop_mirroring - stop using mirroring (set mirror count to 1)
- */
-void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio)
-{
-       pgio->pg_mirror_count = 1;
-       pgio->pg_mirror_idx = 0;
-}
-
 static void nfs_pageio_cleanup_mirroring(struct nfs_pageio_descriptor *pgio)
 {
        pgio->pg_mirror_count = 1;
@@ -1302,6 +1293,14 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
        }
 }
 
+/*
+ * nfs_pageio_stop_mirroring - stop using mirroring (set mirror count to 1)
+ */
+void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio)
+{
+       nfs_pageio_complete(pgio);
+}
+
 int __init nfs_init_nfspagecache(void)
 {
        nfs_page_cachep = kmem_cache_create("nfs_page",