smb: smbdirect: introduce smbdirect_socket.workqueue

The client currently used a per socket workqueue
because it can block in a work function
waiting for credits.

So we use a per socket pointer in order to prepare
common code.

Cc: Steve French <[email protected]>
Cc: Tom Talpey <[email protected]>
Cc: Long Li <[email protected]>
Acked-by: Namjae Jeon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Stefan Metzmacher <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: metze-samba

fs/smb/common/smbdirect/smbdirect_socket.h

@@ -51,6 +51,14 @@ struct smbdirect_socket {
 	enum smbdirect_socket_status status;
 	wait_queue_head_t status_wait;
 
+	/*
+	 * This points to the workqueue to
+	 * be used for this socket.
+	 * It can be per socket (on the client)
+	 * or point to a global workqueue (on the server)
+	 */
+	struct workqueue_struct *workqueue;
+
 	struct work_struct disconnect_work;
 
 	/* RDMA related */