linux-kernel - Re: libata & no PCI: dma_[un]map

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Date:	Tue, 5 Jun 2007 16:50:56 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Christoph Hellwig <hch@...radead.org>,
	David Miller <davem@...emloft.net>, mroos@...ux.ee,
	linux-kernel@...r.kernel.org
Subject: Re: libata & no PCI: dma_[un]map_single undefined

> If you don't have DMA capabilities, does libata still need ->pad and
> ->pad_dma set?

It shouldn't - nor the prd. You don't need to use the default
ata_port_start in this case. I've just added ata_sff_port_start to my
tree which figures out which to allocate for SFF devices.

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