Messages in this thread | | | Date | Wed, 21 Jan 2009 22:58:08 +0000 | From | Alan Cox <> | Subject | Re: 2.6.29-rc libata sff 32bit PIO regression |
| |
On Thu, 22 Jan 2009 01:51:17 +0300 Sergei Shtylyov <sshtylyov@ru.mvista.com> wrote:
> Hello. > > Alan Cox wrote: > > >> Hugh Dickins writes: > >> > I've a Dell Precision 670 here (four-year-old EM64T Xeon with ata_piix) > >> > which doesn't like your commit 871af1210f13966ab911ed2166e4ab2ce775b99d > >> > libata: Add 32bit PIO support. Full dmesg (and .config) attached, but > >> > here's an extract showing the start of the error messages on ata2: > >> > > > > Cool - so we need two different 32bit PIO methods - at least according to > > the docs for the AMD we should use entirely 32bit I/O there. Fun fun > > > > Could you refer me to the exact AMD doc that requires that?
AMD762 page 82, under DevB:1x40 bit 14 and bit 12
"Note: only 32-bit writes to the data port are allowed when this bit is set."
| |