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FROMGIT: power: reset: sc27xx: Change to use cpu_down()

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To allow the SC27XX driver can be built as a module, and the
freeze_secondary_cpus() symbol is not exported, thus we can change
to use the exported cpu_down() API to shut down other cpus to avoid
racing, which is same as the freeze_secondary_cpus().

bug: 146864653
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
(cherry picked from commit 274afbc3ad33136962d66447e89d02e3c142a30a
https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next)
This commit is contained in:
Baolin Wang 2020-03-09 16:18:45 +08:00 • committed by Todd Kjos
commit 072cc0324b
1 changed files with 6 additions and 3 deletions
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9
drivers/power/reset/sc27xx-poweroff.c
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@ -29,10 +29,13 @@ static struct regmap *regmap;
*/
static void sc27xx_poweroff_shutdown(void)
{
#ifdef CONFIG_PM_SLEEP_SMP
int cpu = smp_processor_id();
#ifdef CONFIG_HOTPLUG_CPU
int cpu;
freeze_secondary_cpus(cpu);
for_each_online_cpu(cpu) {
if (cpu != smp_processor_id())
cpu_down(cpu);
}
#endif
}