[PATCH] smb: client: fix first failure in negotiation after server reboot

["zhangjian (CG)" <zhangjian496@huawei.com>]

after fabc4ed200f9, server_unresponsive add a condition to check whether
 client need to reconnect depending on server->lstrp. When client failed 
to reconnect in 180s, client will abort connection and update server-
>lstrp for the last time. In the following scene, server->lstrp is too 
old, which may cause failure for the first negotiation.

client                                         | server
-----------------------------------------------+-----------
mount to cifs server                           |
ls                                             |
                                               | reboot
    stuck for 180s and return EHOSTDOWN        |
    abort connection and update server->lstrp  |
                                               | service smb restart
ls                                             |
    smb_negotiate                              |
        server_unresponsive is true [in cifsd] |
        cifs_sync_mid_result return EAGAIN     |
    smb_negotiate return EHOSTDOWN             |
ls failed                                      |

we update server->lstrp before last switching into CifsInNegotiate state 
to avoid this failure.

Fixes: fabc4ed200f9 ("smb: client: fix hang in wait_for_response() for 
negproto")
Signed-off-by: zhangjian <zhangjian496@huawei.com>
---
 fs/smb/client/connect.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 28bc33496..f9aef60f1 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -4193,6 +4193,7 @@ cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses,
 		return 0;
 	}
 
+	server->lstrp = jiffies;
 	server->tcpStatus = CifsInNegotiate;
 	spin_unlock(&server->srv_lock);
 
-- 
2.33.0