Re: Updated libata PATA patch

Kevin Radloff
2006-05-10T16:39:24Z

On 5/10/06, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Mer, 2006-05-10 at 12:05 -0400, Kevin Radloff wrote:
> > > ae.irq_flags = SA_SHIRQ ?
> >
> > Another new and exciting oops :)
>
> Yay, so that one was the PCMCIA code being broken.
>
> > pcmcia: registering new device pcmcia1.0
> > ata3: PATA max PIO0 cmd 0x3100 ctl 0x310E bmdma 0x0 irq 11
> > ata3: dev 0 cfg 49:0200 82:0000 83:0000 84:0000 85:0000 86:0000 87:0000 88:0000
> > ata3: dev 0 ATA-10, max PIO4, 2001888 sectors: LBA
> > ata3: dev 0 configured for PIO0
>
> This is all good. Its a PIO0 device (PCMCIA is ISA cycles which are PIO0
> cycles)
>
> > scsi2 : pata_pcmcia
> > Vendor: ATA Model: SanDisk SDCFH-10 Rev: HDX
> > Type: Direct-Access ANSI SCSI revision: 05
> > SCSI device sdb: 2001888 512-byte hdwr sectors (1025 MB)
>
> The disk was found and the indentify data came out correctly.
>
> > sdb: Write Protect is off
> > sdb: Mode Sense: 00 3a 00 00
> > SCSI device sdb: drive cache: write through
> > SCSI device sdb: 2001888 512-byte hdwr sectors (1025 MB)
> > sdb: Write Protect is off
> > sdb: Mode Sense: 00 3a 00 00
> > SCSI device sdb: drive cache: write through
>
> The drive was sized, the cache checked properly.
>
> > sdb:<1>BUG: unable to handle kernel NULL pointer dereference at
> > virtual address 00000000
>
> Awww.. how to ruin a good day 8)
>
> At this point its trying to read the partition table. It has translated
> the command into a SCSI command block and into ATA,. It has queued it,
> and it has just set out to issue it when it went boom
>
> I'll do some more digging, but putting printks into ata_qc_issue_prot to
> see where it explodes is the next step I suspect.

Ah, I see.. I'll be waiting. :)

--
Kevin 'radsaq' Radloff
radsaq@gmail.com