5 files changed, 39 insertions, 0 deletions

diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
index b7967d5c3f9a..d54ac733c47d 100644
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -231,6 +231,14 @@ been disconnected and a LIBUSB_ERROR code on failure.
 .Pp
 .
 .Ft int
+.Fn libusb_check_connected "libusb_device_handle *devh"
+Test if USB device is still connected. Returns 0 on success,
+LIBUSB_ERROR_NO_DEVICE if has been disconnected and a LIBUSB_ERROR
+code on failure.
+.
+.Pp
+.
+.Ft int
 .Fn libusb_kernel_driver_active "libusb_device_handle *devh" "int interface"
 Determine if a driver is active on a interface. Returns 0 if no kernel driver
 is active, returns 1 if a kernel driver is active, returns LIBUSB_ERROR_NO_DEVICE
@@ -488,6 +496,7 @@ The library is also compliant with LibUSB version 0.1.12.
 .Fn usb_find_devices
 .Fn usb_device
 .Fn usb_get_busses
+.Fn usb_check_connected
 .
 .Sh SEE ALSO
 .Xr libusb20 3 ,
diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
index b8e2322b734a..9458316c2e7e 100644
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -316,6 +316,7 @@ int	libusb_set_configuration(libusb_device_handle * devh, int configuration);
 int	libusb_claim_interface(libusb_device_handle * devh, int interface_number);
 int	libusb_release_interface(libusb_device_handle * devh, int interface_number);
 int	libusb_reset_device(libusb_device_handle * devh);
+int	libusb_check_connected(libusb_device_handle * devh);
 int 	libusb_kernel_driver_active(libusb_device_handle * devh, int interface);
 int 	libusb_detach_kernel_driver(libusb_device_handle * devh, int interface);
 int 	libusb_attach_kernel_driver(libusb_device_handle * devh, int interface);
diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
index a3f0087b8227..7d6c9d93fb4a 100644
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -663,6 +663,21 @@ libusb_reset_device(struct libusb20_device *pdev)
 }
 
 int
+libusb_check_connected(struct libusb20_device *pdev)
+{
+	libusb_device *dev;
+	int err;
+
+	dev = libusb_get_device(pdev);
+	if (dev == NULL)
+		return (LIBUSB_ERROR_INVALID_PARAM);
+
+	err = libusb20_dev_check_connected(pdev);
+
+	return (err ? LIBUSB_ERROR_NO_DEVICE : 0);
+}
+
+int
 libusb_kernel_driver_active(struct libusb20_device *pdev, int interface)
 {
 	if (pdev == NULL)
diff --git a/lib/libusb/libusb20_compat01.c b/lib/libusb/libusb20_compat01.c
index 6f261bf98d1f..aaafb02cb11e 100644
--- a/lib/libusb/libusb20_compat01.c
+++ b/lib/libusb/libusb20_compat01.c
@@ -795,6 +795,19 @@ usb_reset(usb_dev_handle * dev)
 	return (usb_close(dev));
 }
 
+int
+usb_check_connected(usb_dev_handle * dev)
+{
+	int err;
+
+	err = libusb20_dev_check_connected((void *)dev);
+
+	if (err)
+		return (-1);
+
+	return (0);
+}
+
 const char *
 usb_strerror(void)
 {
diff --git a/lib/libusb/usb.h b/lib/libusb/usb.h
index a29f48d47349..8ee68f29acb8 100644
--- a/lib/libusb/usb.h
+++ b/lib/libusb/usb.h
@@ -291,6 +291,7 @@ int	usb_set_altinterface(usb_dev_handle * dev, int alternate);
 int	usb_resetep(usb_dev_handle * dev, unsigned int ep);
 int	usb_clear_halt(usb_dev_handle * dev, unsigned int ep);
 int	usb_reset(usb_dev_handle * dev);
+int	usb_check_connected(usb_dev_handle * dev);
 const char *usb_strerror(void);
 void	usb_init(void);
 void	usb_set_debug(int level);