Staging: hv: util: kvp: Cleanup kvp_get_domain_name()

Cleanup kvp_get_domain_name(). If getaddrinfo() fails, deal with it properly
(this can happen if no IP address has been assigned). Also, don't specify
a specific service in the call to getaddrinfo() to make this code as generic
as possible. Lastly, move the call to gethostname() after the local variables.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/tools/hv_kvp_daemon.c

@@ -273,22 +273,20 @@ static int
 kvp_get_domain_name(char *buffer, int length)
 {
 	struct addrinfo	hints, *info ;
-	gethostname(buffer, length);
 	int error = 0;
 
+	gethostname(buffer, length);
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_CANONNAME;
 
-	error = getaddrinfo(buffer, "http", &hints, &info);
+	error = getaddrinfo(buffer, NULL, &hints, &info);
 	if (error != 0) {
 		strcpy(buffer, "getaddrinfo failed\n");
-		error = 1;
-		goto get_domain_done;
+		return error;
 	}
 	strcpy(buffer, info->ai_canonname);
-get_domain_done:
 	freeaddrinfo(info);
 	return error;
 }