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Subject[PATCH 4.9 47/56] usb: host: xhci-rcar: Add XHCI_TRUST_TX_LENGTH quirk
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

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

From: Yasushi Asano <yasano@jp.adit-jv.com>

commit 40fc165304f0faaae78b761f8ee30b5d216b1850 upstream.

When plugging BUFFALO LUA4-U3-AGT USB3.0 to Gigabit Ethernet LAN
Adapter, warning messages filled up dmesg.

[ 101.098287] xhci-hcd ee000000.usb: WARN Successful completion on short TX for slot 1 ep 4: needs XHCI_TRUST_TX_LENGTH quirk?
[ 101.117463] xhci-hcd ee000000.usb: WARN Successful completion on short TX for slot 1 ep 4: needs XHCI_TRUST_TX_LENGTH quirk?
[ 101.136513] xhci-hcd ee000000.usb: WARN Successful completion on short TX for slot 1 ep 4: needs XHCI_TRUST_TX_LENGTH quirk?

Adding the XHCI_TRUST_TX_LENGTH quirk resolves the issue.

Signed-off-by: Yasushi Asano <yasano@jp.adit-jv.com>
Signed-off-by: Spyridon Papageorgiou <spapageorgiou@de.adit-jv.com>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/host/xhci-rcar.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -192,5 +192,6 @@ int xhci_rcar_init_quirk(struct usb_hcd
xhci_rcar_is_gen3(hcd->self.controller))
xhci->quirks |= XHCI_NO_64BIT_SUPPORT;

+ xhci->quirks |= XHCI_TRUST_TX_LENGTH;
return xhci_rcar_download_firmware(hcd);
}

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