OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Power management fixes for final 5.0 

- Use hrtimer_try_to_cancel() instead of hrtimer_cancel() in the
    PM-runtime framework to avoid a possible timer-related deadlock
    introduced recently (Vincent Guittot).
 
  - Reorder the scmi-cpufreq driver code to avoid accessing memory
    that has just been freed (Yangtao Li).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJcb8D1AAoJEILEb/54YlRxeUsP/2MefwrqcqSGpsbmH2V3vBBa
 RP6La5u8+ZYJiCSi0uvwgWy6UXuvRMIE9W6nl2+b4V+AQZcvo5KYvbRFbE12U2JI
 maYEBrgqNFjxECfSmkizAKg33kEaKLxTiK6lQ973kHnkMQ/HyZfdHuNuzkIOViRv
 hc8ceJi90ojlrTGpwFeV/Kl3L9LvFjkN1GdNTM4GEdJNAkcKz0VFYDhwThcHVY2A
 KyWxBoHUre+ORnv8Z+MFtV3CXrZQZFFNvl1X2CcHksgZDXiEaWolQ/u/kEnb17Xb
 a9wzdo+vDtwCRx7MHK3cneukAmcRlareQFgr+FFA+eo3kTfJteV+iFnYNxnO2pg6
 CtJ33xlaaEfNbuMZuSL4H9cJmmyF5NNoOLtvocWHGZSu6fKTUTalTxuXffZSUacE
 alYlveyxK7s9o+7WcfW2VyGLsYg60pWe2Suws0vKZhmbZNl/KCRgVHTGbZ9PiHK3
 bgvlTA0vzvdNjs7BebedpyRhu69nuhZ7TSLGWW0Q2vOTeMVtabx5mRGgZMq/MA7U
 qIte4pi/LyC6UOxPG9Y8IFgZfhbQ0qmCs0TvMCxeZxqnR4bFYCILl2GUCKXS+csy
 4GmRMV+Bi+4fmdJFUCCnfhAUAKGs535m9sA8pKHy3L+8XC2JiaOunrfHXc693P3B
 7naqbmFx4Ezl+Dxs6yGd
 =7rW+
 -----END PGP SIGNATURE-----

Merge tag 'pm-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a regression in the PM-runtime framework introduced by the
  recent switch-over of it to using hrtimers and a use-after-free
  introduced by one of the recent changes in the scmi-cpufreq driver.

  Specifics:

   - Use hrtimer_try_to_cancel() instead of hrtimer_cancel() in the
     PM-runtime framework to avoid a possible timer-related deadlock
     introduced recently (Vincent Guittot).

   - Reorder the scmi-cpufreq driver code to avoid accessing memory that
     has just been freed (Yangtao Li)"

* tag 'pm-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM-runtime: Fix deadlock when canceling hrtimer
  cpufreq: scmi: Fix use-after-free in scmi_cpufreq_exit()
This commit is contained in:
Linus Torvalds 2019-02-22 17:46:30 -08:00
parent 9053d2db8b 5b317cbf2b
commit ef4edb3ed8
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/base/power/runtime.c
View File

@ -95,7 +95,7 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status)
static void pm_runtime_deactivate_timer(struct device *dev)
{
if (dev->power.timer_expires > 0) {
hrtimer_cancel(&dev->power.suspend_timer);
hrtimer_try_to_cancel(&dev->power.suspend_timer);
dev->power.timer_expires = 0;
}
}

2
drivers/cpufreq/scmi-cpufreq.c
View File

@ -187,8 +187,8 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy)
cpufreq_cooling_unregister(priv->cdev);
dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
kfree(priv);
dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
kfree(priv);
return 0;
}