diff options
Diffstat (limited to 'sys/dev/usb/controller/xhci.c')
| -rw-r--r-- | sys/dev/usb/controller/xhci.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/dev/usb/controller/xhci.c b/sys/dev/usb/controller/xhci.c index 72d1ff5e0ae5..e35a0a5d2407 100644 --- a/sys/dev/usb/controller/xhci.c +++ b/sys/dev/usb/controller/xhci.c @@ -3848,9 +3848,16 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer) mask = (1U << epno); - if (epno != 1 && drop != 0) { + /* + * So-called control and isochronous transfer types have + * predefined data toggles (USB 2.0) or sequence numbers (USB + * 3.0) and does not need to be dropped. + */ + if (drop != 0 && + (edesc->bmAttributes & UE_XFERTYPE) != UE_CONTROL && + (edesc->bmAttributes & UE_XFERTYPE) != UE_ISOCHRONOUS) { /* drop endpoint context to reset data toggle value, if any. */ - xhci_configure_mask(udev, mask, 1); + xhci_configure_mask(udev, mask, 1); err = xhci_cmd_configure_ep(sc, buf_inp.physaddr, 0, index); if (err != 0) { DPRINTF("Could not drop " |