From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Thu, 26 Jun 2008 08:14:15 +0000 (+0900)
Subject: tc35815: Fix receiver hangup on Rx FIFO overflow
X-Git-Tag: v2.6.26-rc9~84^2~43
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ccc57aac9c9532b4540968632a8c4a0b946dbcc4;p=linux-2.6

tc35815: Fix receiver hangup on Rx FIFO overflow

On Rx FIFO overflow error, the controller consume a buffer descriptor
but currently the driver does not give it back to the controller.
This results unrecoverable 'Buffer List Exhausted' condition.  This
patch fix this problem by moving a "fbl_count--" line to proper place.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index dccea52516..b07b8cbade 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -1736,7 +1736,6 @@ tc35815_rx(struct net_device *dev)
 			skb = lp->rx_skbs[cur_bd].skb;
 			prefetch(skb->data);
 			lp->rx_skbs[cur_bd].skb = NULL;
-			lp->fbl_count--;
 			pci_unmap_single(lp->pci_dev,
 					 lp->rx_skbs[cur_bd].skb_dma,
 					 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
@@ -1792,6 +1791,7 @@ tc35815_rx(struct net_device *dev)
 #ifdef TC35815_USE_PACKEDBUFFER
 			while (lp->fbl_curid != id)
 #else
+			lp->fbl_count--;
 			while (lp->fbl_count < RX_BUF_NUM)
 #endif
 			{