Re: LibPATA code issues / 2.6.15.4

[Justin Piszcz <jpiszcz@lucidpixels.com>]

Second patch fails for me.

On a clean 2.6.15.4 source tree:

p34:/usr/src# ls -ld linux
lrwxrwxrwx  1 root src 14 2006-02-25 12:41 linux -> linux-2.6.15.4/

The one from your e-mail earlier:
p34:/usr/src/linux# patch -p1 < /tmp/patch1
patching file drivers/scsi/libata-scsi.c
Hunk #1 succeeded at 404 (offset -16 lines).
Hunk #2 succeeded at 414 (offset -16 lines).
Hunk #3 succeeded at 493 (offset -16 lines).
Hunk #4 succeeded at 505 (offset -16 lines).
Hunk #5 succeeded at 547 (offset -16 lines).
Hunk #6 succeeded at 622 (offset -16 lines).

p34:/usr/src/linux# patch -p1 < /tmp/12_libata_ata_opcode.patch
patching file drivers/scsi/libata-core.c
Hunk #1 succeeded at 245 (offset -8 lines).
Hunk #2 succeeded at 267 (offset -8 lines).
Hunk #3 succeeded at 288 (offset -8 lines).
Hunk #4 succeeded at 310 (offset -8 lines).
Hunk #5 succeeded at 500 (offset -8 lines).
Hunk #6 FAILED at 626.
1 out of 6 hunks FAILED -- saving rejects to file 
drivers/scsi/libata-core.c.rej
patching file drivers/scsi/libata-scsi.c
Hunk #1 succeeded at 414 (offset -24 lines).
Hunk #2 succeeded at 493 (offset -24 lines).
Hunk #3 FAILED at 505.
Hunk #4 succeeded at 547 (offset -24 lines).
Hunk #5 succeeded at 622 (offset -24 lines).
Hunk #6 succeeded at 1308 (offset -29 lines).
1 out of 6 hunks FAILED -- saving rejects to file 
drivers/scsi/libata-scsi.c.rej
patching file include/linux/ata.h
Hunk #1 succeeded at 239 (offset -5 lines).
patching file include/linux/libata.h
Hunk #1 succeeded at 368 (offset -52 lines).
Hunk #2 succeeded at 452 (offset -60 lines).
p34:/usr/src/linux#


Should I be using 2.6.16-rcX?

On Sat, 25 Feb 2006, Mark Lord wrote:

> David Greaves wrote:
> ..
> > Thanks Mark - I've finally gotten this patch applied.
> >
> > With smartd disabled and no smart commands issued, a readonly badblocks
> > scan of /dev/sdb2 shows no problems and now gives:
> > Feb 25 10:38:31 haze kernel: ata2: status=0x51 { DriveReady SeekComplete
> > Error }
> > Feb 25 10:38:32 haze kernel: ata2: no sense translation for op=0x28
> > status: 0x51
> > Feb 25 10:38:32 haze kernel: ata2: status=0x51 { DriveReady SeekComplete
> > Error }
> > Feb 25 10:38:35 haze kernel: ata2: no sense translation for op=0x28
> > status: 0x51
> > hundreds of times.
> ..
>
> Mmmm.. okay, it's happening due to a SCSI READ_10 opcode,
> which means it isn't being triggered by any of the FUA stuff.
>
> But there's still no obvious reason for the error.
> The drive is basically just saying "command rejected",
> and libata-scsi is translating that into "medium error"
> for some unknown reason.
>
> Unfortunately, the design of the current libata is such that
> we no longer have access to the actual ATA opcode that was rejected.
> It gets overwritten by the returned drive status on completion.
>
> So.. I need to generate another patch for you now, to save/show
> the real ATA opcode that was used to cause the errors.
> My theory is that we'll discover that it is one that your drive
> legitimately is rejecting (unsupported LBA48 or something..).
>
> But we won't know until we see the output.
>
> Second patch is attached:  apply *in addition* to the first one.
>
> Cheers
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