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

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Message-ID: <20130511170923.52673453@nehalam.linuxnetplumber.net>
Date:	Sat, 11 May 2013 17:09:23 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	"David S. Miller" <davem@...emloft.net>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Francois Romieu <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org
Subject: [PATCH net] 8139cp: reset BQL when ring tx ring cleared

While looking for other problem found this potential issue.
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	2013-05-02 14:30:52.182573290 -0700
+++ b/drivers/net/ethernet/realtek/8139cp.c	2013-05-11 17:06:51.163362372 -0700
@@ -1136,6 +1136,7 @@ static void cp_clean_rings (struct cp_pr
 			cp->dev->stats.tx_dropped++;
 		}
 	}
+	netdev_tx_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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