powercap/dtpm_cpu: Add exit function

Now that we can destroy the hierarchy, the code must remove what it
had put in place at the creation. In our case, the cpu hotplug
callbacks.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220130210210.549877-6-daniel.lezcano@linaro.org

diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
index 71f45d2f5a606f98605f1a686b4f42db30ab2db2..bca2f912d3496f3435552d6a1377562c31159c79 100644 (file)
--- a/drivers/powercap/dtpm_cpu.c
+++ b/drivers/powercap/dtpm_cpu.c
@@ -299,8 +299,15 @@ static int dtpm_cpu_init(void)
        return 0;
 }
 
+static void dtpm_cpu_exit(void)
+{
+       cpuhp_remove_state_nocalls(CPUHP_AP_ONLINE_DYN);
+       cpuhp_remove_state_nocalls(CPUHP_AP_DTPM_CPU_DEAD);
+}
+
 struct dtpm_subsys_ops dtpm_cpu_ops = {
        .name = KBUILD_MODNAME,
        .init = dtpm_cpu_init,
+       .exit = dtpm_cpu_exit,
        .setup = dtpm_cpu_setup,
 };