cifs: Call MID callback before destroying transport

When transport is being destroyed, it's possible that some processes may
hold memory registrations that need to be deregistred.

Call them first so nobody is using transport resources, and it can be
destroyed.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 33e4d98fc11507f8e351a6ea40667e70b7a529a7..084756cfdaee134975bdbcdf756c2c6d9a12604b 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -528,22 +528,6 @@ cifs_reconnect(struct TCP_Server_Info *server)
        /* do not want to be sending data on a socket we are freeing */
        cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
        mutex_lock(&server->srv_mutex);
-       if (server->ssocket) {
-               cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
-                        server->ssocket->state, server->ssocket->flags);
-               kernel_sock_shutdown(server->ssocket, SHUT_WR);
-               cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
-                        server->ssocket->state, server->ssocket->flags);
-               sock_release(server->ssocket);
-               server->ssocket = NULL;
-       } else if (cifs_rdma_enabled(server))
-               smbd_destroy(server);
-       server->sequence_number = 0;
-       server->session_estab = false;
-       kfree(server->session_key.response);
-       server->session_key.response = NULL;
-       server->session_key.len = 0;
-       server->lstrp = jiffies;
 
        /* mark submitted MIDs for retry and issue callback */
        INIT_LIST_HEAD(&retry_list);
@@ -556,7 +540,6 @@ cifs_reconnect(struct TCP_Server_Info *server)
                list_move(&mid_entry->qhead, &retry_list);
        }
        spin_unlock(&GlobalMid_Lock);
-       mutex_unlock(&server->srv_mutex);
 
        cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
        list_for_each_safe(tmp, tmp2, &retry_list) {
@@ -565,6 +548,25 @@ cifs_reconnect(struct TCP_Server_Info *server)
                mid_entry->callback(mid_entry);
        }
 
+       if (server->ssocket) {
+               cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
+                        server->ssocket->state, server->ssocket->flags);
+               kernel_sock_shutdown(server->ssocket, SHUT_WR);
+               cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
+                        server->ssocket->state, server->ssocket->flags);
+               sock_release(server->ssocket);
+               server->ssocket = NULL;
+       } else if (cifs_rdma_enabled(server))
+               smbd_destroy(server);
+       server->sequence_number = 0;
+       server->session_estab = false;
+       kfree(server->session_key.response);
+       server->session_key.response = NULL;
+       server->session_key.len = 0;
+       server->lstrp = jiffies;
+
+       mutex_unlock(&server->srv_mutex);
+
        do {
                try_to_freeze();