3 files changed, 16 insertions, 1 deletions

diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
index 03113c0a152f..c91c61d8d351 100644
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd June 16, 2016
+.Dd June 17, 2016
 .Dt LIBUSB 3
 .Os
 .Sh NAME
@@ -106,6 +106,12 @@ counter decremented once.
 Returns the number of the bus contained by the device
 .Fa dev .
 .Pp
+.Ft uint8_t
+.Fn libusb_get_port_number "libusb_device *dev"
+Returns the port number which the device given by
+.Fa dev
+is attached to.
+.Pp
 .Ft int
 .Fn libusb_get_port_numbers "libusb_device *dev" "uint8_t *buf" "uint8_t bufsize"
 Stores, in the buffer
diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
index 4a7249999504..c3d69f5b9420 100644
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -406,6 +406,7 @@ void	libusb_exit(struct libusb_context *ctx);
 ssize_t libusb_get_device_list(libusb_context * ctx, libusb_device *** list);
 void	libusb_free_device_list(libusb_device ** list, int unref_devices);
 uint8_t	libusb_get_bus_number(libusb_device * dev);
+uint8_t	libusb_get_port_number(libusb_device * dev);
 int	libusb_get_port_numbers(libusb_device *dev, uint8_t *buf, uint8_t bufsize);
 int	libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t *buf, uint8_t bufsize);
 uint8_t	libusb_get_device_address(libusb_device * dev);
diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
index 20376f936257..1f64252d3715 100644
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -308,6 +308,14 @@ libusb_get_bus_number(libusb_device *dev)
 	return (libusb20_dev_get_bus_number(dev->os_priv));
 }
 
+uint8_t
+libusb_get_port_number(libusb_device *dev)
+{
+	if (dev == NULL)
+		return (0);		/* should not happen */
+	return (libusb20_dev_get_parent_port(dev->os_priv));
+}
+
 int
 libusb_get_port_numbers(libusb_device *dev, uint8_t *buf, uint8_t bufsize)
 {