Message-ID: <4420CAD4.60700@garzik.org>
Date: Tue, 21 Mar 2006 22:56:04 -0500
From: Jeff Garzik <jeff@garzik.org>
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To: Ed Sweetman <safemode@comcast.net>
CC: linux-kernel@vger.kernel.org
Subject: Re: libata ignores non-dma disks?
References: <4420B7D6.4020706@comcast.net>
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Ed Sweetman wrote:
> I'm using 2.6.16-rc6-ide1 (alan's patchset) and using the sata_nv and
> pata_amd drivers.  I have all UDMA drives except a CF disk -> IDE
> interface, which should be running in PIO mode4.   Libata detects the
> device, but spits out a message about "no dma" and then says it's not
> supported and is ignoring it.   Is this device not supported because
> it's not using dma or for some other reason?
> It's the only device on it's channel (secondary pata)
> 
> ata6: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xF008 irq 15
> ata6: dev 0 cfg 49:0e00 82:0000 83:0000 84:0000 85:0000 86:0000 87:0000
> 88:0000
> ata6: no dma
> ata6: dev 0 not supported, ignoring
> scsi5 : pata_amd

Delete the "no dma" check, and debug from there...  PIO support is in 
there, just needs a few final fixes.

	Jeff


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