From: Tejun Heo <htejun@gmail.com>
Date: Thu, 25 Oct 2007 09:30:36 +0000 (+0900)
Subject: libata: track SLEEP state and issue SRST to wake it up
X-Git-Tag: v2.6.24-rc2~99^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=054a5fbaceb2eb3a31ea843c1cf0b8e10b91478c;p=pandora-kernel.git

libata: track SLEEP state and issue SRST to wake it up

ATA devices in SLEEP mode don't respond to any commands.  SRST is
necessary to wake it up.  Till now, when a command is issued to a
device in SLEEP mode, the command times out, which makes EH reset the
device and retry the command after that, causing a long delay.

This patch makes libata track SLEEP state and issue SRST automatically
if a command is about to be issued to a device in SLEEP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Bruce Allen <ballen@gravity.phys.uwm.edu>
Cc: Andrew Paprocki <andrew@ishiboo.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

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