From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 12 Oct 2007 01:08:29 +0000 (-0700)
Subject: [NET]: Fix NAPI completion handling in some drivers.
X-Git-Tag: v2.6.24-rc1~1454^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f535763165331bb91277d7519b507fed22034e5;p=pandora-kernel.git

[NET]: Fix NAPI completion handling in some drivers.

In order for the list handling in net_rx_action() to be
correct, drivers must follow certain rules as stated by
this comment in net_rx_action():

		/* Drivers must not modify the NAPI state if they
		 * consume the entire weight.  In such cases this code
		 * still "owns" the NAPI instance and therefore can
		 * move the instance around on the list at-will.
		 */

A few drivers do not do this because they mix the budget checks
with reading hardware state, resulting in crashes like the one
reported by takano@axe-inc.co.jp.

BNX2 and TG3 are taken care of here, SKY2 fix is from Stephen
Hemminger.

Signed-off-by: David S. Miller <davem@davemloft.net>
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