From: Alan Stern <stern@rowland.harvard.edu>
Date: Wed, 16 Jun 2010 18:52:17 +0000 (-0400)
Subject: [SCSI] sd: add support for runtime PM
X-Git-Tag: v2.6.36-rc1~570^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=478a8a0543021172220feeb0b39bb1b3e43c988f;p=pandora-kernel.git

[SCSI] sd: add support for runtime PM

This patch (as1399) adds runtime-PM support to the sd driver.  The
support is unsophisticated: If a SCSI disk device is mounted, or if
its device file is held open, then the device will not be
runtime-suspended; otherwise it will (provided userspace gives
permission by writing "auto" to the sysfs power/control attribute).

In order to make this work, a dev_set_drvdata() call had to be moved
from sd_probe_async() to sd_probe().  Also, a few lines of code were
changed to use a local variable instead of recalculating the address
of an embedded struct device.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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