Re: 2.9.29.2: ide-tape: panic when probing device at boot

From: Borislav Petkov
Date: Sat May 09 2009 - 12:18:23 EST


Hi,

On Sat, May 09, 2009 at 05:57:49PM +0200, Bartlomiej Zolnierkiewicz wrote:
>
> [ cc:ing linux-ide and knowledgeable people ]
>
> Borislav/Tejun:
>
> Is the 2.6.29 problem the same thing that was fixed recently?

I'll let Tejun answer that one since I don't get an oops. However, now
that I have an ide-tape hardware here, I do get something DMA-related
failing during boot:

[ 1.677012] hdb: Seagate STT8000A, ATAPI TAPE drive

..

[ 1.701097] hdb: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 1.708289] hdb: bad DMA info in identify block
[ 1.712872] hdb: host max PIO4 wanted PIO255(auto-tune) selected PIO4

..

[ 3.450381] Uniform CD-ROM driver Revision: 3.20
[ 5.467347] ide-tape: hdb <-> ht0: Seagate STT8000A rev 5.44
[ 5.484852] ide-tape: hdb <-> ht0: 88KBps, 14*26kB buffer, 400ms tDS

and more specifically the bad DMA info in identify block thing above. I
haven't looked into it yet but its next on my TODO.

> Should I just push commit 1e75540ec5202cae63cd238c86bd880e3d496546
> ("ide-tape: remove back-to-back REQUEST_SENSE detection") to Linus
> or there is more needed to bring ide-tape to the world of living?

... and I'm afraid we'll have to do some serious bugfixing since this
driver is behaving really funny :). Stay tuned, I'm on it.

--
Regards/Gruss,
Boris.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/