cifs: smbd: Return -EAGAIN when transport is reconnecting

During reconnecting, the transport may have already been destroyed and is in
the process being reconnected. In this case, return -EAGAIN to not fail and
to retry this I/O.

Signed-off-by: Long Li <longli@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 19300e0..4104f59 100644 (file)
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -325,8 +325,11 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
        int val = 1;
        __be32 rfc1002_marker;
 
-       if (cifs_rdma_enabled(server) && server->smbd_conn) {
-               rc = smbd_send(server, num_rqst, rqst);
+       if (cifs_rdma_enabled(server)) {
+               /* return -EAGAIN when connecting or reconnecting */
+               rc = -EAGAIN;
+               if (server->smbd_conn)
+                       rc = smbd_send(server, num_rqst, rqst);
                goto smbd_done;
        }