linux-kernel - Re: serverworks CSB5 IDE: DMA disabled on secondary channel

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Message-ID: <20080718100607.1589ed2f@the-village.bc.nu>
Date:	Fri, 18 Jul 2008 10:06:07 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Frantisek Hanzlik <franta@...zlici.cz>,
	linux-kernel@...r.kernel.org
Subject: Re: serverworks CSB5 IDE: DMA disabled on secondary channel

> > ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33
> > ata2.00: simplex DMA is claimed by other device, disabling DMA
> > ata2.01: simplex DMA is claimed by other device, disabling DMA
> > ata2.00: configured for PIO4
> > ata2.01: configured for PIO4


Disable the pata_acpi driver and let me know if it then behaves. We had a
similar problem with the ATI hardware which lost and messed up its
internal state if pata_acpi was loaded first.

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