cifs: smbd: Return -EAGAIN when transport is reconnecting

commit 4357d45f50e58672e1d17648d792f27df01dfccd upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index fe77f41bff9f2438094542207a32e9af7928f97c..0c4df56c825abf30fd8bc9af035010eb32f6f2e0 100644 (file)
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -286,8 +286,11 @@ __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;
        }
        if (ssocket == NULL)