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Date:	Mon, 08 Mar 2010 09:56:37 -0800 (PST)
From:	David Miller <>
Subject: Re: [kernel,2.6.33-git11] lib8390: use spin_lock_irqsave for

From: Ken Kawasaki <>
Date: Mon, 8 Mar 2010 21:24:33 +0900

>> This change is not correct.
>> disable_irq is being intentionally used because the reset
>> sequence can take a very long time and we don't want to
>> have cpu interrupts disabled during the entire sequence.
>> Otherwise slow serial devices will drop characters and
>> stuff like that.
> Actually, disable_irq is _not_ safe for lib8390 on SMP system.
> Same CPU or other CPU can call enable_irq.
> so lib8390 does not work properly on my SMP system.

Then you need to fix that bug, because your patch here, again,
is not correct.
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