usb: xhci: Add XHCI_TRUST_TX_LENGTH for Renesas uPD720201

commit da99706689481717998d1d48edd389f339eea979 upstream.

When plugging in a USB webcam I see the following message:
xhci_hcd 0000:04:00.0: WARN Successful completion on short TX: needs
XHCI_TRUST_TX_LENGTH quirk?
handle_tx_event: 913 callbacks suppressed

All is quiet again with this patch (and I've done a fair but of soak
testing with the camera since).

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 6bc448701a9cdd9dfd84df93736f512d2aaee2fd..e8b6bef4e78d7da1292a9fc37e4b366ea72ee66f 100644 (file)
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -171,6 +171,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
                xhci->quirks |= XHCI_TRUST_TX_LENGTH;
                xhci->quirks |= XHCI_BROKEN_STREAMS;
        }
+       if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
+                       pdev->device == 0x0014)
+               xhci->quirks |= XHCI_TRUST_TX_LENGTH;
        if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
                        pdev->device == 0x0015)
                xhci->quirks |= XHCI_RESET_ON_RESUME;