diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 81fa8506825d..42b93da1085d 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1539,6 +1539,32 @@ void usb_hcd_disable_endpoint(struct usb_device *udev, hcd->driver->endpoint_disable(hcd, ep); } +/** + * usb_hcd_reset_endpoint - reset host endpoint state + * @udev: USB device. + * @ep: the endpoint to reset. + * + * Resets any host endpoint state such as the toggle bit, sequence + * number and current window. + */ +void usb_hcd_reset_endpoint(struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + struct usb_hcd *hcd = bus_to_hcd(udev->bus); + + if (hcd->driver->endpoint_reset) + hcd->driver->endpoint_reset(hcd, ep); + else { + int epnum = usb_endpoint_num(&ep->desc); + int is_out = usb_endpoint_dir_out(&ep->desc); + int is_control = usb_endpoint_xfer_control(&ep->desc); + + usb_settoggle(udev, epnum, is_out, 0); + if (is_control) + usb_settoggle(udev, epnum, !is_out, 0); + } +} + /* Protect against drivers that try to unlink URBs after the device * is gone, by waiting until all unlinks for @udev are finished. * Since we don't currently track URBs by device, simply wait until |