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firmware: psci: Replace cpu_up/down() with add/remove_cpu() 

The core device API performs extra housekeeping bits that are missing
from directly calling cpu_up/down().

See commit a6717c01dd ("powerpc/rtas: use device model APIs and
serialization during LPM") for an example description of what might go
wrong.

This also prepares to make cpu_up/down a private interface of the CPU subsystem.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lkml.kernel.org/r/20200323135110.30522-15-qais.yousef@arm.com
This commit is contained in:
Qais Yousef 2020-03-23 13:51:07 +00:00 committed by Thomas Gleixner
parent a926f81d2f
commit 20fb50295b
1 changed files with 2 additions and 2 deletions
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4
drivers/firmware/psci/psci_checker.c
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@ -84,7 +84,7 @@ static unsigned int down_and_up_cpus(const struct cpumask *cpus,
/* Try to power down all CPUs in the mask. */
for_each_cpu(cpu, cpus) {
int ret = cpu_down(cpu);
int ret = remove_cpu(cpu);
/*
* cpu_down() checks the number of online CPUs before the TOS
@ -116,7 +116,7 @@ static unsigned int down_and_up_cpus(const struct cpumask *cpus,
/* Try to power up all the CPUs that have been offlined. */
for_each_cpu(cpu, offlined_cpus) {
int ret = cpu_up(cpu);
int ret = add_cpu(cpu);
if (ret != 0) {
pr_err("Error occurred (%d) while trying "