usbip: adding names db to port operation

Adding names database to port command.

BEFORE) 'unknown' for vendor and product string.

Imported USB devices
====================
Port 00: <Port in Use> at Low Speed(1.5Mbps)
       unknown vendor : unknown product (03f0:0224)
       3-1 -> usbip://10.0.2.15:3240/5-1
           -> remote bus/dev 005/002

AFTER) Most vendor string will be converted.

Imported USB devices
====================
Port 00: <Port in Use> at Low Speed(1.5Mbps)
       Hewlett-Packard : unknown product (03f0:0224)
       3-1 -> usbip://10.0.2.15:3240/5-1
           -> remote bus/dev 005/002
Signed-off-by: Nobuo Iwata <nobuo.iwata@fujixerox.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/usb/usbip/src/usbip_port.c

@@ -22,10 +22,13 @@ static int list_imported_devices(void)
 	struct usbip_imported_device *idev;
 	int ret;
 
+	if (usbip_names_init(USBIDS_FILE))
+		err("failed to open %s", USBIDS_FILE);
+
 	ret = usbip_vhci_driver_open();
 	if (ret < 0) {
 		err("open vhci_driver");
-		return -1;
+		goto err_names_free;
 	}
 
 	printf("Imported USB devices\n");
@@ -35,13 +38,19 @@ static int list_imported_devices(void)
 		idev = &vhci_driver->idev[i];
 
 		if (usbip_vhci_imported_device_dump(idev) < 0)
-			ret = -1;
+			goto err_driver_close;
 	}
 
 	usbip_vhci_driver_close();
+	usbip_names_free();
 
 	return ret;
 
+err_driver_close:
+	usbip_vhci_driver_close();
+err_names_free:
+	usbip_names_free();
+	return -1;
 }
 
 int usbip_port_show(__attribute__((unused)) int argc,