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Subject[PATCH 4.19 31/47] cifs: smbd: Return -EAGAIN when transport is reconnecting
Date
From: Long Li <longli@microsoft.com>

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>

---
fs/cifs/transport.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -286,8 +286,11 @@ __smb_send_rqst(struct TCP_Server_Info *
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)

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