netdev - [PATCH 1/2] tulip: napi full quantum bug

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Message-ID: <20071213093545.436b8f8e@freepuppy.rosehill>
Date:	Thu, 13 Dec 2007 09:35:45 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	kristjan <kristjan.ugrin@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jeff Garzik <jgarzik@...ox.com>
Cc:	netdev@...r.kernel.org
Subject: [PATCH 1/2] tulip: napi full quantum bug

This should fix the kernel warn/oops reported while routing.

The tulip driver has a fencepost bug with new NAPI in 2.6.24
It has an off by one bug if a full quantum is reached.

Signed-off-by: Stephen Hemminger <shemminger@...ux-foundation.org>


--- a/drivers/net/tulip/interrupt.c	2007-12-13 09:20:27.000000000 -0800
+++ b/drivers/net/tulip/interrupt.c	2007-12-13 09:23:34.000000000 -0800
@@ -151,7 +151,8 @@ int tulip_poll(struct napi_struct *napi,
                        if (tulip_debug > 5)
                                printk(KERN_DEBUG "%s: In tulip_rx(), entry %d %8.8x.\n",
                                       dev->name, entry, status);
-		       if (work_done++ >= budget)
+
+		       if (++work_done >= budget)
                                goto not_done;
 
                        if ((status & 0x38008300) != 0x0300) {
--
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