Messages in this thread | | | Date | Mon, 28 Nov 2011 21:27:34 +0000 | From | Alan Cox <> | Subject | Re: 3.1.3 2.6.37.6 2.6.33.4 kernel bug in pata_oldpiix driver |
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> BUG: unable to handle kernel paging request at 45230451
That looks like junk from somewhere.
> IP: [<c17bb1f3>] oldpiix_set_dmamode+0xb3/0x120
> [<c17bb3b0>] ? oldpiix_qc_issue+0x40/0x60 > [<c1788d8a>] ? ata_qc_issue+0x1ea/0x330
So we were issuing a command, we called the oldpiix code, it decided that the timings were not loaded for this drive (ie it was those loaded for the other device on the bus)
It will then have gone into oldpiix_set_piomode which ran succesfully implying that ap and adev were valid at that point but seem to have mysteriously gone invalid later.
No idea, and the fact that changing things like the pre-empt behaviour or build options makes me wonder if it was scribbled on from elsewhere.
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