From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: Bug#590327: linux-image-2.6.32-5-amd64: Unbalanced enable for
 IRQ 19
Date: Wed, 07 Sep 2011 00:39:31 -0400 (EDT)
Message-ID: <20110907.003931.1112417911793078586.davem@davemloft.net>
References: <20110729151848.GA24689@pisco.westfalen.local>
	<20110731184933.GA2442@goneko.de>
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From: Ben Hutchings <ben@decadent.org.uk>
Date: Wed, 07 Sep 2011 05:16:01 +0100

> This is somewhat unusual in that the IDE controller will be sharing its
> IRQ, but that's supposed to work.
> 
> However, the IDE core attempts to disable and enable the IRQ *before* it
> allocates it.  If the UHCI driver then allocates the IRQ in the middle
> of this, the IRQ manager will reset the disable count since the IRQ is
> not yet shared!
> 
> This might be fixable by changing the IDE core to allocate the IRQ with
> a dummy interrupt handler while probing.
> 
> Aside from that, maybe pata_it8213 is ready as a replacement for it8213
> now?  (Kconfig still labels it as EXPERIMENTAL.)

I've known about this IDE layer problem for at least a year and any
fix is too risky to consider seriously.

Use the PATA drivers on modern systems, don't use the deprecated IDE
layer.