[ 11/27] 8139cp: reset BQL when ring tx ring cleared

From: Greg Kroah-Hartman
Date: Tue Jun 25 2013 - 14:36:07 EST


3.4-stable review patch. If anyone has any objections, please let me know.

------------------

From: stephen hemminger <stephen@xxxxxxxxxxxxxxxxxx>

[ 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@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/realtek/8139cp.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -1097,6 +1097,7 @@ 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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