From: Michael Chan <mchan@broadcom.com>
Date: Mon, 25 Apr 2005 22:14:03 +0000 (-0700)
Subject: [TG3]: Fix bug in tg3_rx()
X-Git-Tag: v2.6.12-rc4~214^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=483ba50bd41d14d5325d6cd9935de86a982d08a2;p=pandora-kernel.git

[TG3]: Fix bug in tg3_rx()

This patch fixes a bug that causes tg3_has_work() to always return 1.

rx work is determined by comparing tp->rx_rcb_ptr with the current hw
producer index. The hw producer index is modulo the ring size, but tp-
>rx_rcb_ptr is a free running counter that goes up beyond the ring size.
After the ring wraps around once, tg3_has_work() will always return 1.

The fix is to always do modulo arithmetic on tp->rx_rcb_ptr.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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