diff options
| -rw-r--r-- | drivers/usb/host/xhci.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 04eb1eb14d..4b3d58d56e 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -890,11 +890,18 @@ unknown: static int _xhci_submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, int length, int interval) { + if (usb_pipetype(pipe) != PIPE_INTERRUPT) { + printf("non-interrupt pipe (type=%lu)", usb_pipetype(pipe)); + return -EINVAL; + } + /* - * TODO: Not addressing any interrupt type transfer requests - * Add support for it later. + * xHCI uses normal TRBs for both bulk and interrupt. When the + * interrupt endpoint is to be serviced, the xHC will consume + * (at most) one TD. A TD (comprised of sg list entries) can + * take several service intervals to transmit. */ - return -EINVAL; + return xhci_bulk_tx(udev, pipe, length, buffer); } /** |