From: Tejun Heo <tj@kernel.org>
Date: Thu, 24 Feb 2011 18:30:37 +0000 (+0100)
Subject: libata: fix hotplug for drivers which don't implement LPM
X-Git-Tag: v2.6.37.5~59
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=873cd78f82db88cac1109a45a348248fcd4a84de;p=pandora-kernel.git

libata: fix hotplug for drivers which don't implement LPM

commit eb0e85e36b971ec31610eda7e3ff5c11c1c44785 upstream.

ata_eh_analyze_serror() suppresses hotplug notifications if LPM is
being used because LPM generates spurious hotplug events.  It compared
whether link->lpm_policy was different from ATA_LPM_MAX_POWER to
determine whether LPM is enabled; however, this is incorrect as for
drivers which don't implement LPM, lpm_policy is always
ATA_LPM_UNKNOWN.  This disabled hotplug detection for all drivers
which don't implement LPM.

Fix it by comparing whether lpm_policy is greater than
ATA_LPM_MAX_POWER.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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