From: Christoph Hellwig <hch@lst.de>
Date: Thu, 28 Jan 2010 12:30:11 +0000 (+0100)
Subject: libata: fix ata_id_logical_per_physical_sectors
X-Git-Tag: v2.6.33-rc7~5^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7acede65d6b65919aee5b6a360a17cedb11f2f7;p=pandora-kernel.git

libata: fix ata_id_logical_per_physical_sectors

The value we get from the low byte of the ATA_ID_SECTOR_SIZE word is not not
a plain multiple, but the log of it, so fix the helper to give the correct
answer.  Without this we'll get an incorrect minimal I/O size in the block
limits VPD page for 4k sector drives.

Also change the return value of ata_id_logical_per_physical_sectors to u16
for the unlikely case of very large logical sectors.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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