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cpuidle: PSCI: Move the has_lpi check to the beginning of the function

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commit 01f6c7338c upstream.

Currently the first thing checked is whether the PCSI cpu_suspend function
has been initialized.

Another change will be overloading `acpi_processor_ffh_lpi_probe` and
calling it sooner.  So make the `has_lpi` check the first thing checked
to prepare for that change.

Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mario Limonciello 2022-02-25 13:06:45 -06:00 committed by Greg Kroah-Hartman
parent cfa98ffc42
commit 503934df31
1 changed files with 3 additions and 3 deletions
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6
arch/arm64/kernel/cpuidle.c
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@ -54,6 +54,9 @@ static int psci_acpi_cpu_init_idle(unsigned int cpu)
struct acpi_lpi_state *lpi; struct acpi_lpi_state *lpi;
struct acpi_processor *pr = per_cpu(processors, cpu); struct acpi_processor *pr = per_cpu(processors, cpu);
if (unlikely(!pr || !pr->flags.has_lpi))
return -EINVAL;
/* /*
* If the PSCI cpu_suspend function hook has not been initialized * If the PSCI cpu_suspend function hook has not been initialized
* idle states must not be enabled, so bail out * idle states must not be enabled, so bail out
@ -61,9 +64,6 @@ static int psci_acpi_cpu_init_idle(unsigned int cpu)
if (!psci_ops.cpu_suspend) if (!psci_ops.cpu_suspend)
return -EOPNOTSUPP; return -EOPNOTSUPP;
if (unlikely(!pr || !pr->flags.has_lpi))
return -EINVAL;
count = pr->power.count - 1; count = pr->power.count - 1;
if (count <= 0) if (count <= 0)
return -ENODEV; return -ENODEV;