From: Tejun Heo <htejun@gmail.com>
Date: Sun, 5 Mar 2006 08:55:58 +0000 (+0900)
Subject: [PATCH] libata: implement ata_dev_revalidate()
X-Git-Tag: v2.6.17-rc1~1182^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=623a3128aa2b86caa8e06e762e9e444177e4fa47;p=pandora-kernel.git

[PATCH] libata: implement ata_dev_revalidate()

ata_dev_revalidate() re-reads IDENTIFY PAGE of the given device and
makes sure it's the same device as the configured one.  Once it's
verified that it's the same device, @dev is configured according to
newly read IDENTIFY PAGE.  Note that revalidation currently doesn't
invoke transfer mode reconfiguration.

Criteria for 'same device'

* same class (of course)
* same model string
* same serial string
* if ATA, same n_sectors (to catch geometry parameter changes)

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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