PM: Allow device drivers to use dpm_wait()
commitf8824cee405c62ba465b85365201166d9cf86a14
authorRafael J. Wysocki <rjw@sisk.pl>
Wed, 27 Jan 2010 22:47:38 +0000 (27 23:47 +0100)
committerRafael J. Wysocki <rjw@sisk.pl>
Fri, 26 Feb 2010 19:39:11 +0000 (26 20:39 +0100)
tree90020be3264ff98bad2f14759127a2d9693673d8
parent97df8c12995c5bac73e3bfeea4c5be155c1f4401
PM: Allow device drivers to use dpm_wait()

There are some dependencies between devices (in particular, between
EHCI USB controllers and their OHCI/UHCI siblings) which are not
reflected by the structure of the device tree.  With synchronous
suspend and resume these dependencies are taken into accout
automatically, because the devices in question are always registered
in the right order, but to meet these constraints with asynchronous
suspend and resume the drivers of these devices will need to use
dpm_wait() in their suspend/resume routines, so introduce a helper
function allowing them to do that.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
drivers/base/power/main.c
include/linux/pm.h