diff --git a/net/9p/client.c b/net/9p/client.c
index 7dd4e78..431eaef 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -72,23 +72,22 @@
 EXPORT_SYMBOL(p9_is_proto_dotu);
 
 /* Interpret mount option for protocol version */
-static int get_protocol_version(const substring_t *name)
+static int get_protocol_version(char *s)
 {
 	int version = -EINVAL;
 
-	if (!strncmp("9p2000", name->from, name->to-name->from)) {
+	if (!strcmp(s, "9p2000")) {
 		version = p9_proto_legacy;
 		P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
-	} else if (!strncmp("9p2000.u", name->from, name->to-name->from)) {
+	} else if (!strcmp(s, "9p2000.u")) {
 		version = p9_proto_2000u;
 		P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
-	} else if (!strncmp("9p2000.L", name->from, name->to-name->from)) {
+	} else if (!strcmp(s, "9p2000.L")) {
 		version = p9_proto_2000L;
 		P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
-	} else {
-		P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ",
-							name->from);
-	}
+	} else
+		printk(KERN_INFO "9p: Unknown protocol version %s.\n", s);
+
 	return version;
 }
 
@@ -106,6 +105,7 @@
 	char *p;
 	substring_t args[MAX_OPT_ARGS];
 	int option;
+	char *s;
 	int ret = 0;
 
 	clnt->proto_version = p9_proto_2000u;
@@ -141,22 +141,41 @@
 			clnt->msize = option;
 			break;
 		case Opt_trans:
-			clnt->trans_mod = v9fs_get_trans_by_name(&args[0]);
-			if(clnt->trans_mod == NULL) {
+			s = match_strdup(&args[0]);
+			if (!s) {
+				ret = -ENOMEM;
 				P9_DPRINTK(P9_DEBUG_ERROR,
-				   "Could not find request transport: %s\n",
-				   (char *) &args[0]);
+					"problem allocating copy of trans arg\n");
+				goto free_and_return;
+			 }
+			clnt->trans_mod = v9fs_get_trans_by_name(s);
+			if (clnt->trans_mod == NULL) {
+				printk(KERN_INFO
+					"9p: Could not find "
+					"request transport: %s\n", s);
 				ret = -EINVAL;
+				kfree(s);
 				goto free_and_return;
 			}
+			kfree(s);
 			break;
 		case Opt_legacy:
 			clnt->proto_version = p9_proto_legacy;
 			break;
 		case Opt_version:
-			ret = get_protocol_version(&args[0]);
-			if (ret == -EINVAL)
+			s = match_strdup(&args[0]);
+			if (!s) {
+				ret = -ENOMEM;
+				P9_DPRINTK(P9_DEBUG_ERROR,
+					"problem allocating copy of version arg\n");
 				goto free_and_return;
+			}
+			ret = get_protocol_version(s);
+			if (ret == -EINVAL) {
+				kfree(s);
+				goto free_and_return;
+			}
+			kfree(s);
 			clnt->proto_version = ret;
 			break;
 		default: