On Fri, 11 Jan 2008, Rafael J. Wysocki wrote: > Hi, > > The patch below is intended as a replacement for > gregkh-driver-pm-acquire-device-locks-prior-to-suspending.patch that deadlocked > suspend and hibernation on some systems. Â The present patch contains some > safeguards against deadlocks in the relevant cases and a mechanism to print > warnings if a deadlock is probable. > > Greetings, > Rafael > > --- > From: Rafael J. Wysocki <rjw@xxxxxxx>, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > > This patch reorganizes the way suspend and resume notifications are > sent to drivers. The major changes are that now the PM core acquires > every device semaphore before calling the methods, and calls to > device_add() during suspends will fail, while calls to device_del() > during suspends will block. > > It also provides a way to safely remove a suspended device with the > help of the PM core, by using the device_pm_schedule_removal() callback > introduced specifically for this purpose, and updates two drivers (msr > and cpuid) that need to use it. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
