tree 3f8c8f9d337a5fa88828b923c3d457ad1b035750
parent 1358e038fac2628730842c817c7c156647166461
author Boris Ostrovsky <boris.ostrovsky@oracle.com> 1481814058 -0500
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1482285172 +0100

cpufreq: Remove CPU hotplug callbacks only if they were initialized

Since CPU hotplug callbacks are requested for CPUHP_AP_ONLINE_DYN state,
successful callback initialization will result in cpuhp_setup_state()
returning a positive value. Therefore acpi_cpufreq_online being zero
indicates that callbacks have not been installed.

This means that acpi_cpufreq_boost_exit() should only remove them if
acpi_cpufreq_online is positive. Trying to call
cpuhp_remove_state_nocalls(0) will cause a BUG().

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>