diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index d1498c03c4cb..56f6c584c651 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2061,6 +2061,16 @@ static int handle_tx_event(struct xhci_hcd *xhci, if (!event_seg) { if (!ep->skip || !usb_endpoint_xfer_isoc(&td->urb->ep->desc)) { + /* Some host controllers give a spurious + * successful event after a short transfer. + * Ignore it. + */ + if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) && + ep_ring->last_td_was_short) { + ep_ring->last_td_was_short = false; + ret = 0; + goto cleanup; + } /* HC is busted, give up! */ xhci_err(xhci, "ERROR Transfer event TRB DMA ptr not " @@ -2071,6 +2081,10 @@ static int handle_tx_event(struct xhci_hcd *xhci, ret = skip_isoc_td(xhci, td, event, ep, &status); goto cleanup; } + if (trb_comp_code == COMP_SHORT_TX) + ep_ring->last_td_was_short = true; + else + ep_ring->last_td_was_short = false; if (ep->skip) { xhci_dbg(xhci, "Found td. Clear skip flag.\n"); |