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Date:	Sun, 07 Oct 2007 18:54:45 +0200
From:	Manfred Spraul <>
To:	Jeff Garzik <>
CC:	Yinghai Lu <>,
	Ayaz Abdulla <>,
	nedev <>,
	Linux Kernel Mailing List <>,
	David Miller <>,
	Andrew Morton <>
Subject: Re: MSI interrupts and disable_irq

Jeff Garzik wrote:
> Interested parties should try the forcedeth patches I just posted :)
The patches look good, but I would still prefer to understand why the 
current implementation causes crashes before rewriting everything.

I've just noticed that netpoll_send_skb() calls ->hard_start_xmit() and 
->poll() within local_irq_save().
Thus it seems that  spin_lock_irqsave() must be used in the poll() and 
hard_start_xmit() callbacks, at least in nics that support 


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