NFS: Don't recoalesce on error in nfs_pageio_complete_mirror()

If the I/O completion failed with a fatal error, then we should just
exit nfs_pageio_complete_mirror() rather than try to recoalesce.

Fixes: 83640929b2ca ("nfs: add mirroring support to pgio layer")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.0+

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 03bde9a4145127a01417808b18e209f230fc22b5..a8951f1f7b4e00fcc29da996c713ba2dc41aabbc 100644 (file)
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1209,7 +1209,7 @@ static void nfs_pageio_complete_mirror(struct nfs_pageio_descriptor *desc,
                desc->pg_mirror_idx = mirror_idx;
        for (;;) {
                nfs_pageio_doio(desc);
-               if (!mirror->pg_recoalesce)
+               if (desc->pg_error < 0 || !mirror->pg_recoalesce)
                        break;
                if (!nfs_do_recoalesce(desc))
                        break;