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Allow opening multiple endpoints for the same device, if configuration is also the same.

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This commit is contained in:
Ivan Krasin
2013-06-16 20:29:54 -07:00
parent 333941e08d
commit b0713f61b4
1 changed files with 8 additions and 2 deletions
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10
usb/device.go
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@@ -157,8 +157,14 @@ func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error
found:
// Set the configuration
if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
var activeConf C.int
if errno := C.libusb_get_configuration(d.handle, &activeConf); errno < 0 {
return nil, fmt.Errorf("usb: getcfg: %s", usbError(errno))
}
if int(activeConf) != int(conf) {
if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
}
}
// Claim the interface