From: stephen hemminger <stephen@networkplumber.org>
Date: Mon, 20 May 2013 06:54:43 +0000 (+0000)
Subject: 8139cp: reset BQL when ring tx ring cleared
X-Git-Tag: v3.9.8~45
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6921ecb3fb34ea14a4b82d0f9d8853ceee8f1201;p=thirdparty%2Fkernel%2Fstable.git

8139cp: reset BQL when ring tx ring cleared

[ Upstream commit 98962baad72fd6d393bf39dbb7c2076532c363c6 ]

This patch cures transmit timeout's with DHCP observed
while running under KVM. When the transmit ring is cleaned out,
the Byte Queue Limit values need to be reset.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index b62a32484f6a6..dd45d7d0f1063 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -1136,6 +1136,7 @@ static void cp_clean_rings (struct cp_private *cp)
 			cp->dev->stats.tx_dropped++;
 		}
 	}
+	netdev_reset_queue(cp->dev);
 
 	memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
 	memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);