4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peng Tao <[email protected]>

commit 05f54903d9d370a4cd302a85681304d3ec59e5c1 upstream.

For flexfiles driver, we might choose to read from mirror index other
than 0 while mirror_count is always 1 for read.

Reported-by: Jean Spector <[email protected]>
Cc: Weston Andros Adamson <[email protected]>
Signed-off-by: Peng Tao <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 fs/nfs/direct.c |    2 --
 1 file changed, 2 deletions(-)

--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -129,8 +129,6 @@ nfs_direct_good_bytes(struct nfs_direct_
        int i;
        ssize_t count;
 
-       WARN_ON_ONCE(hdr->pgio_mirror_idx >= dreq->mirror_count);
-
        if (dreq->mirror_count == 1) {
                dreq->mirrors[hdr->pgio_mirror_idx].count += hdr->good_bytes;
                dreq->count += hdr->good_bytes;


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