Re: [PATCH upstream-fixes] libata: unlock HPA if device shrunk

[Jeff Garzik <jeff@garzik.org>]

On 04/04/2010 09:33 PM, Tejun Heo wrote:
> Some BIOSes don't configure HPA during boot but do so while resuming.
> This causes harddrives to shrink during resume making libata detach
> and reattach them.  This can be worked around by unlocking HPA if old
> size equals native size.
>
> Add ATA_DFLAG_UNLOCK_HPA so that HPA unlocking can be controlled
> per-device and update ata_dev_revalidate() such that it sets
> ATA_DFLAG_UNLOCK_HPA and fails with -EIO when the above condition is
> detected.
>
> This patch fixes the following bug.
>
>    https://bugzilla.kernel.org/show_bug.cgi?id=15396
>
> Signed-off-by: Tejun Heo<tj@kernel.org>
> Reported-by: Oleksandr Yermolenko<yaa.bta@gmail.com>
> ---
>   drivers/ata/libata-core.c |   74 +++++++++++++++++++++++++++-------------------
>   include/linux/libata.h    |    1
>   2 files changed, 46 insertions(+), 29 deletions(-)

patch is bigger than I would like for #upstream-fixes... but nothing to 
be done about that...  applied, thanks