smb: client: remove unused smbd_connection->protocol

There is only one protocol version for smbdirect yet and
this variable is write only.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: metze-samba

fs/smb/client/cifs_debug.c

@@ -24,6 +24,7 @@
 #endif
 #ifdef CONFIG_CIFS_SMB_DIRECT
 #include "smbdirect.h"
+#include "../common/smbdirect/smbdirect_pdu.h"
 #endif
 #include "cifs_swn.h"
 #include "cached_dir.h"
@@ -458,7 +459,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 
 		seq_printf(m, "\nSMBDirect protocol version: 0x%x "
 			"transport status: %s (%u)",
-			server->smbd_conn->protocol,
+			SMBDIRECT_V1,
 			smbdirect_socket_status_string(sc->status),
 			sc->status);
 		seq_printf(m, "\nConn receive_credit_max: %u "

fs/smb/client/smbdirect.c

@@ -481,7 +481,6 @@ static bool process_negotiation_response(
 			le16_to_cpu(packet->negotiated_version));
 		return false;
 	}
-	info->protocol = le16_to_cpu(packet->negotiated_version);
 
 	if (packet->credits_requested == 0) {
 		log_rdma_event(ERR, "error: credits_requested==0\n");

fs/smb/client/smbdirect.h

@@ -39,8 +39,6 @@ extern int smbd_receive_credit_max;
 struct smbd_connection {
 	struct smbdirect_socket socket;
 
-	/* dynamic connection parameters defined in [MS-SMBD] 3.1.1.1 */
-	int protocol;
 
 	/* Memory registrations */
 	/* Maximum number of pages in a single RDMA write/read on this connection */