diff options
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 4 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 14 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index faf039ac657..eafd17fae94 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -118,6 +118,10 @@ static int xhci_pci_setup(struct usb_hcd *hcd) /* AMD PLL quirk */ if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) xhci->quirks |= XHCI_AMD_PLL_FIX; + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) { + xhci->quirks |= XHCI_SPURIOUS_SUCCESS; + } /* Make sure the HC is halted. */ retval = xhci_halt(xhci); diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index d1498c03c4c..56f6c584c65 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"); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 0772a8cfea2..5cfeb8614b8 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1123,6 +1123,7 @@ struct xhci_ring { */ u32 cycle_state; unsigned int stream_id; + bool last_td_was_short; }; struct xhci_erst_entry { @@ -1290,6 +1291,7 @@ struct xhci_hcd { #define XHCI_RESET_EP_QUIRK (1 << 1) #define XHCI_NEC_HOST (1 << 2) #define XHCI_AMD_PLL_FIX (1 << 3) +#define XHCI_SPURIOUS_SUCCESS (1 << 4) /* There are two roothubs to keep track of bus suspend info for */ struct xhci_bus_state bus_state[2]; /* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */ |