From: Rajesh Borundia <rajesh.borundia@qlogic.com>
Date: Mon, 18 Oct 2010 02:03:41 +0000 (+0000)
Subject: netxen: fix race in tx stop queue
X-Git-Tag: v2.6.37-rc1~147^2~97
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a9905e64272c8021a8cfaf6015dd0fb8eeeb378;p=pandora-kernel.git

netxen: fix race in tx stop queue

There is race between netif_stop_queue and netif_stopped_queue
check.So check once again if buffers are available to avoid race.
With above logic we can also get rid of tx lock in process_cmd_ring.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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