From: Yasushi Asano <yasano@jp.adit-jv.com>
Date: Mon, 18 Feb 2019 10:26:34 +0000 (+0100)
Subject: usb: host: xhci-rcar: Add XHCI_TRUST_TX_LENGTH quirk
X-Git-Tag: v4.9.167~10
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=94502785ef270d53e2e475f902d875d35b060f13;p=thirdparty%2Fkernel%2Fstable.git

usb: host: xhci-rcar: Add XHCI_TRUST_TX_LENGTH quirk

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>
---

diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 0e4535e632ec9..64ee8154f2bbb 100644
--- 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 *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);
 }