4.9-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 4.19.33 / usb-host-xhci-rcar-add-xhci_trust_tx_length-quirk.patch

From 40fc165304f0faaae78b761f8ee30b5d216b1850 Mon Sep 17 00:00:00 2001
From: Yasushi Asano <yasano@jp.adit-jv.com>
Date: Mon, 18 Feb 2019 11:26:34 +0100
Subject: usb: host: xhci-rcar: Add XHCI_TRUST_TX_LENGTH quirk

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
@@ -246,6 +246,7 @@ int xhci_rcar_init_quirk(struct usb_hcd
 	if (!xhci_rcar_wait_for_pll_active(hcd))
 		return -ETIMEDOUT;
 
+	xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 	return xhci_rcar_download_firmware(hcd);
 }