linux-kernel - Re: [PATCH] pata_atiixp: override cable detection on MSI E350DM-E33

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Message-ID: <502E7F19.50306@pobox.com>
Date:	Fri, 17 Aug 2012 13:27:53 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Arnd Hannemann <arnd@...dnet.de>
CC:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pata_atiixp: override cable detection on MSI E350DM-E33

On 08/17/2012 04:11 AM, Arnd Hannemann wrote:
> The mainboard MSI E350DM-E33 is advertised with 6 SATA ports.
> As it turns out, two of them seem to be driven by on-board
> SATA<->PATA converters. If a disk drive is connected to one
> of them kernel uses UDMA/33 mode due to cable detection:
>
> [   34.550823] scsi4 : pata_atiixp
> [   34.555517] scsi5 : pata_atiixp
> [   34.555942] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
> [   34.555948] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
> ...
> [   35.040799] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
> [   35.040806] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
> [   35.040817] ata5.00: limited to UDMA/33 due to 40-wire cable
> [   35.049166] ata5.00: configured for UDMA/33
> [   35.049402] scsi 4:0:0:0: Direct-Access     ATA      WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
>
> This patch forces "short cable" mode on this board, as it seems clear that
> the on-board SATA<->PATA "cable" is short.
> With this patch the disk is configured for UDMA/100:
>
> [    5.976756] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
> [    5.996434] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
> [    6.024787] ata5.00: configured for UDMA/100
>
> Testing revealed no transfer issues.
>
> Signed-off-by: Arnd Hannemann <arnd@...dnet.de>

applied



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