From 6970363a60b1b5db967f95fb986e0c7bdb83c84d Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Mon, 24 Feb 2020 14:31:02 -0600
Subject: [PATCH] cifs: call wake_up(&server->response_q) inside of
 cifs_reconnect()
Patch-mainline: Not yet, in for-next branch
References: bsc#1144333

This means it's consistently called and the callers don't need to
care about it.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
 fs/cifs/cifssmb.c | 1 -
 fs/cifs/connect.c | 7 ++-----
 fs/cifs/smb2ops.c | 3 ---
 3 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6e95ee69dd18..b173ff22560b 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1602,7 +1602,6 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 	if (server->ops->is_session_expired &&
 	    server->ops->is_session_expired(buf)) {
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -1;
 	}
 
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e2196b363765..f4d12b79ceed 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -489,6 +489,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 		dfs_cache_free_tgts(&tgt_list);
 		cifs_put_tcp_super(sb);
 #endif
+		wake_up(&server->response_q);
 		return rc;
 	} else
 		server->tcpStatus = CifsNeedReconnect;
@@ -623,6 +624,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	if (server->tcpStatus == CifsNeedNegotiate)
 		mod_delayed_work(cifsiod_wq, &server->echo, 0);
 
+	wake_up(&server->response_q);
 	return rc;
 }
 
@@ -717,7 +719,6 @@ server_unresponsive(struct TCP_Server_Info *server)
 		cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n",
 			 (3 * server->echo_interval) / HZ);
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return true;
 	}
 
@@ -850,7 +851,6 @@ is_smb_response(struct TCP_Server_Info *server, unsigned char type)
 		 */
 		cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		break;
 	default:
 		cifs_server_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
@@ -1022,7 +1022,6 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 		server->vals->header_preamble_size) {
 		cifs_server_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -ECONNABORTED;
 	}
 
@@ -1070,7 +1069,6 @@ cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 	if (server->ops->is_session_expired &&
 	    server->ops->is_session_expired(buf)) {
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -1;
 	}
 
@@ -1164,7 +1162,6 @@ cifs_demultiplex_thread(void *p)
 			cifs_server_dbg(VFS, "SMB response too short (%u bytes)\n",
 				 server->pdu_size);
 			cifs_reconnect(server);
-			wake_up(&server->response_q);
 			continue;
 		}
 
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index c31e84ee3c39..5fa34225a99b 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -4149,7 +4149,6 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
 	if (server->ops->is_session_expired &&
 	    server->ops->is_session_expired(buf)) {
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -1;
 	}
 
@@ -4513,14 +4512,12 @@ smb3_receive_transform(struct TCP_Server_Info *server,
 		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
 			 pdu_length);
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -ECONNABORTED;
 	}
 
 	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
 		cifs_server_dbg(VFS, "Transform message is broken\n");
 		cifs_reconnect(server);
-		wake_up(&server->response_q);
 		return -ECONNABORTED;
 	}
 
-- 
2.25.1