linux-kernel - Re: [git patches] libata fixes

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Date:	Fri, 31 Oct 2008 09:20:36 -0400
From:	"Greg Freemyer" <greg.freemyer@...il.com>
To:	"Jeff Garzik" <jeff@...zik.org>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git patches] libata fixes

On Fri, Oct 31, 2008 at 1:49 AM, Jeff Garzik <jeff@...zik.org> wrote:
>
> Notes:
>
> 1) 1.5TB drive fix from Roland
>
> 2) Tejun's sata_via brings a non-working via configuration thanks to a
>   new facility also being used in recent (ICH9/10) ata_piix.
>
>   Change is longer than one might like, but it accurately describes the
>   hardware now, the previous stuff wasn't working, and the newly added
>   support code shouldn't touch non-broken VIA controllers.
>
>
>
> Please pull from 'upstream-linus' branch of
> master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus
>
> to receive the following updates:
>
>  drivers/ata/ata_piix.c    |    1 -
>  drivers/ata/libata-core.c |   11 +++-
>  drivers/ata/sata_via.c    |  155 +++++++++++++++++++++++++++++++++++++++++----
>  include/linux/libata.h    |    1 +
>  4 files changed, 152 insertions(+), 16 deletions(-)
>
> Jens Axboe (1):
>      libata: add whitelist for devices with known good pata-sata bridges
>
> Randy Dunlap (1):
>      ATA: remove excess kernel-doc notation
>
> Roland Dreier (1):
>      libata: Avoid overflow in ata_tf_to_lba48() when tf->hba_lbal > 127
>
> Tejun Heo (1):
>      sata_via: fix support for 5287
<snip>

> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index 2ff633c..82af701 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -1268,7 +1268,7 @@ u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
>
>        sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
>        sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
> -       sectors |= (tf->hob_lbal & 0xff) << 24;
> +       sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
>        sectors |= (tf->lbah & 0xff) << 16;
>        sectors |= (tf->lbam & 0xff) << 8;
>        sectors |= (tf->lbal & 0xff);
<snip>

That looks really serious.

What happens with all previous / stable kernels when connecting up a
1.5TB drive and the user tries to use the last portion of the drive?

Greg
-- 
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