From: Dongdong Deng <dongdong.deng@windriver.com>
Date: Sun, 12 Jul 2009 20:27:06 +0000 (+0000)
Subject: drivers/net: using spin_lock_irqsave() in net_send_packet()
X-Git-Tag: v2.6.31-rc4~55^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79fbe134832ebb70a49d8802cfeb2401dc35bb38;p=pandora-kernel.git

drivers/net: using spin_lock_irqsave() in net_send_packet()

spin_unlock_irq() will enable interrupt in net_send_packet(),
this patch changes it to spin_lock_irqsave/spin_lock_irqrestore,
so that it doesn't enable interrupts when already disabled,
and netconsole would work properly over cs89x0/isa-skeleton.

Call trace:
netconsole write_msg()
{
 ...
 -> spin_lock_irqsave();
        -> netpoll_send_udp()
          -> netpoll_send_skb()
            -> net_send_packet()
              ->...

 -> spin_unlock_irqrestore();
 ...
}

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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