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Message-ID: <42A3061C.7010604@drzeus.cx>
Date: Sun, 05 Jun 2005 16:03:08 +0200
From: Pierre Ossman <drzeus-list@drzeus.cx>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
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Subject: Re: ISA DMA controller hangs
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Pierre Ossman wrote:
> 
> I added some debug output to the driver, dumping the DMA controller's
> registers before and after suspend and it seems it goes completely
> apeshit. The registers are filled with, what it seems, random data. The
> reason it stops working seems to be that channel 4 gets disabled killing
> the cascaded channels. I'm going to try and confirm this today.
> 

Confirmed. By explicitly reenabling DMA channel 4 in the driver on
resumt the DMA transfers work fine.