tree c5dd73b8ab2e6337b7b10d5b76ee66b68dd5d566
parent 4a3dfb3fc0fb0fc9acd36c94b7145f9c9dd4d93a
author Richard Cochran <rcochran@linutronix.de> 1459976451 -0400
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1460059854 +0200

intel_idle: Fix deallocation order on the driver exit path.

In the module_exit() method, this driver first frees its per-CPU
pointer, then unregisters a callback making use of the pointer.
Furthermore, the function, intel_idle_cpuidle_devices_uninit, is racy
against CPU hot plugging as it calls for_each_online_cpu().

This patch corrects the issues by unregistering first on the exit path
while holding the hot plug lock.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>