[PATCH 4.9 68/75] usb: xhci: Add XHCI_TRUST_TX_LENGTH for Renesas uPD720201

From: Greg Kroah-Hartman
Date: Mon Jan 01 2018 - 09:37:27 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Daniel Thompson <daniel.thompson@xxxxxxxxxx>

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@xxxxxxxxxx>
Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/usb/host/xhci-pci.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -190,6 +190,9 @@ static void xhci_pci_quirks(struct devic
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;
if (pdev->vendor == PCI_VENDOR_ID_VIA)