netdev - [PATCH net 2/2] 8139cp: reset BQL when ring tx ring cleared

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Message-ID: <20130520095443.2d18b2cb@nehalam.linuxnetplumber.net>
Date:	Mon, 20 May 2013 09:54:43 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	David Miller <davem@...emloft.net>
Cc:	Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org
Subject: [PATCH net 2/2]  8139cp: reset BQL when ring tx ring cleared

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@...workplumber.org>

--- a/drivers/net/ethernet/realtek/8139cp.c	2013-05-20 09:29:49.689900862 -0700
+++ b/drivers/net/ethernet/realtek/8139cp.c	2013-05-20 09:29:50.857880563 -0700
@@ -1141,6 +1141,7 @@ static void cp_clean_rings (struct cp_pr
 			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);
--
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