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authorRafael J. Wysocki <rjw@sisk.pl>2010-01-27 23:47:38 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2010-02-26 20:39:11 +0100
commitf8824cee405c62ba465b85365201166d9cf86a14 (patch)
tree90020be3264ff98bad2f14759127a2d9693673d8 /Documentation
parent97df8c12995c5bac73e3bfeea4c5be155c1f4401 (diff)
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>
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