diff --git a/fs/ksmbd/smb2ops.c b/fs/ksmbd/smb2ops.c
index 197473871aa4..b06456eb587b 100644
--- a/fs/ksmbd/smb2ops.c
+++ b/fs/ksmbd/smb2ops.c
@@ -187,11 +187,6 @@ static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
 	[SMB2_CHANGE_NOTIFY_HE]	=	{ .proc = smb2_notify},
 };
 
-int init_smb2_0_server(struct ksmbd_conn *conn)
-{
-	return -EOPNOTSUPP;
-}
-
 /**
  * init_smb2_1_server() - initialize a smb server connection with smb2.1
  *			command dispatcher
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index dcf907738610..cd2313af811d 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -236,9 +236,6 @@ int init_smb2_neg_rsp(struct ksmbd_work *work)
 
 	if (conn->need_neg == false)
 		return -EINVAL;
-	if (!(conn->dialect >= SMB20_PROT_ID &&
-	      conn->dialect <= SMB311_PROT_ID))
-		return -EINVAL;
 
 	rsp_hdr = work->response_buf;
 
@@ -1166,13 +1163,6 @@ int smb2_handle_negotiate(struct ksmbd_work *work)
 	case SMB21_PROT_ID:
 		init_smb2_1_server(conn);
 		break;
-	case SMB20_PROT_ID:
-		rc = init_smb2_0_server(conn);
-		if (rc) {
-			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
-			goto err_out;
-		}
-		break;
 	case SMB2X_PROT_ID:
 	case BAD_PROT_ID:
 	default:
@@ -1191,11 +1181,9 @@ int smb2_handle_negotiate(struct ksmbd_work *work)
 	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 
-	if (conn->dialect > SMB20_PROT_ID) {
-		memcpy(conn->ClientGUID, req->ClientGUID,
-		       SMB2_CLIENT_GUID_SIZE);
-		conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
-	}
+	memcpy(conn->ClientGUID, req->ClientGUID,
+			SMB2_CLIENT_GUID_SIZE);
+	conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
 
 	rsp->StructureSize = cpu_to_le16(65);
 	rsp->DialectRevision = cpu_to_le16(conn->dialect);
@@ -1537,11 +1525,9 @@ static int ntlm_authenticate(struct ksmbd_work *work)
 		}
 	}
 
-	if (conn->dialect > SMB20_PROT_ID) {
-		if (!ksmbd_conn_lookup_dialect(conn)) {
-			pr_err("fail to verify the dialect\n");
-			return -ENOENT;
-		}
+	if (!ksmbd_conn_lookup_dialect(conn)) {
+		pr_err("fail to verify the dialect\n");
+		return -ENOENT;
 	}
 	return 0;
 }
@@ -1623,11 +1609,9 @@ static int krb5_authenticate(struct ksmbd_work *work)
 		}
 	}
 
-	if (conn->dialect > SMB20_PROT_ID) {
-		if (!ksmbd_conn_lookup_dialect(conn)) {
-			pr_err("fail to verify the dialect\n");
-			return -ENOENT;
-		}
+	if (!ksmbd_conn_lookup_dialect(conn)) {
+		pr_err("fail to verify the dialect\n");
+		return -ENOENT;
 	}
 	return 0;
 }
diff --git a/fs/ksmbd/smb2pdu.h b/fs/ksmbd/smb2pdu.h
index 261825d06391..a6dec5ec6a54 100644
--- a/fs/ksmbd/smb2pdu.h
+++ b/fs/ksmbd/smb2pdu.h
@@ -1637,7 +1637,6 @@ struct smb2_posix_info {
 } __packed;
 
 /* functions */
-int init_smb2_0_server(struct ksmbd_conn *conn);
 void init_smb2_1_server(struct ksmbd_conn *conn);
 void init_smb3_0_server(struct ksmbd_conn *conn);
 void init_smb3_02_server(struct ksmbd_conn *conn);
diff --git a/fs/ksmbd/smb_common.c b/fs/ksmbd/smb_common.c
index b6c4c7e960fa..707490ab1f4c 100644
--- a/fs/ksmbd/smb_common.c
+++ b/fs/ksmbd/smb_common.c
@@ -88,7 +88,7 @@ unsigned int ksmbd_server_side_copy_max_total_size(void)
 
 inline int ksmbd_min_protocol(void)
 {
-	return SMB2_PROT;
+	return SMB21_PROT;
 }
 
 inline int ksmbd_max_protocol(void)
@@ -427,7 +427,7 @@ int ksmbd_extract_shortname(struct ksmbd_conn *conn, const char *longname,
 
 static int __smb2_negotiate(struct ksmbd_conn *conn)
 {
-	return (conn->dialect >= SMB20_PROT_ID &&
+	return (conn->dialect >= SMB21_PROT_ID &&
 		conn->dialect <= SMB311_PROT_ID);
 }
 
@@ -457,7 +457,7 @@ int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command)
 		}
 	}
 
-	if (command == SMB2_NEGOTIATE_HE) {
+	if (command == SMB2_NEGOTIATE_HE && __smb2_negotiate(conn)) {
 		ret = smb2_handle_negotiate(work);
 		init_smb2_neg_rsp(work);
 		return ret;