From: Yuiko Oshino <yuiko.oshino@microchip.com>
Date: Mon, 15 Jan 2018 13:24:28 -0500
Subject: lan78xx: Fix failure in USB Full Speed
Patch-mainline: v4.15-rc9
Git-commit: a5b1379afbfabf91e3a689e82ac619a7157336b3
References: bsc#1084332

Fix initialize the uninitialized tx_qlen to an appropriate value when USB
Full Speed is used.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexander Graf <agraf@suse.de>
---
 drivers/net/usb/lan78xx.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2396,6 +2396,7 @@
 		buf = DEFAULT_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 		dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE;
 		dev->rx_qlen = 4;
+		dev->tx_qlen = 4;
 	}
 
 	ret = lan78xx_write_reg(dev, BURST_CAP, buf);