netdev - Re: [PATCH net-next 1/2] bnx2: Free IRQ before freeing status block memory

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Message-Id: <20101231.110414.59672398.davem@davemloft.net>
Date:	Fri, 31 Dec 2010 11:04:14 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	mchan@...adcom.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 1/2] bnx2: Free IRQ before freeing status
 block memory

From: "Michael Chan" <mchan@...adcom.com>
Date: Thu, 23 Dec 2010 18:21:59 -0800

> When changing ring size, we free all memory including status block
> memory.  If we're in INTA mode and sharing IRQ, the IRQ handler can
> be called and it will reference the NULL status block pointer.
> 
> Because of the lockless design of the IRQ handler, there is no simple
> way to synchronize and prevent this.  So we avoid this problem by
> freeing the IRQ handler before freeing the status block memory.
> 
> Signed-off-by: Michael Chan <mchan@...adcom.com>

Applied.
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