linux-kernel - Re: [PATCH 02/15] ATA : vortex86 : fix vortex86dx/sx hardware CRC bug.

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Date:	Thu, 27 Oct 2011 08:43:10 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Paul Schilling <paul.s.schilling@...il.com>
Cc:	Jeff Garzik <jgarzik@...ox.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH 02/15] ATA : vortex86 : fix vortex86dx/sx hardware CRC
 bug.

On Tue, 25 Oct 2011 23:16:04 -0500
Paul Schilling <paul.s.schilling@...il.com> wrote:

> This fixes a DMA issue related to a CRC bug on
> the RDC pata peripherial found on the vortex86sx and vortex86dx.

What is the RDC erratum reference for this ? Also it seems to make no
sense


>  	static const struct ata_port_info info_rdc_11 = {
>  		.flags = ATA_FLAG_SLAVE_POSS,
>  		.pio_mask = ATA_PIO4,
> -		.mwdma_mask = ATA_MWDMA2,
> +		.mwdma_mask = 0,
> +		.udma_mask = 0,

MWDMA is not part of the CRC hardware anyway

Are you sure these newer variants are simply not using a different set of
timing parameters thus showing bugs on your system ?
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