nfs: remove WARN_ON_ONCE from nfs_direct_good_bytes

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 <jean@primarydata.com>
Cc: <stable@vger.kernel.org> # v3.19+
Cc: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index e97a67e40b48e0ceed6b13a286a82dabf4921b72..eeb52b434e6fb0e40ed81a905e1574968d395858 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -129,8 +129,6 @@ nfs_direct_good_bytes(struct nfs_direct_req *dreq, struct nfs_pgio_header *hdr)
        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;