PNFS fallback to MDS if no deviceid found

commit b1029c9bc078a6f1515f55dd993b507dcc7e3440 upstream.

If we fail to find a good deviceid while trying to pnfs instead of
propogating an error back fallback to doing IO to the MDS. Currently,
code with fals the IO with EINVAL.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Fixes: 8d40b0f14846f ("NFS filelayout:call GETDEVICEINFO after pnfs_layout_process completes"
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index d175724..2478a69 100644 (file)
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -904,7 +904,7 @@ fl_pnfs_update_layout(struct inode *ino,
        status = filelayout_check_deviceid(lo, fl, gfp_flags);
        if (status) {
                pnfs_put_lseg(lseg);
-               lseg = ERR_PTR(status);
+               lseg = NULL;
        }
 out:
        return lseg;