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ARM: cpuidle: Remove overzealous error logging

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CPUidle back-end operations are not implemented in some platforms
but this should not be considered an error serious enough to be
logged. Check the arm_cpuidle_init() return value to detect whether
the failure must be reported or not in the kernel log and do
not log it if the platform does not support CPUidle operations.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Lorenzo Pieralisi 2019-08-09 12:03:08 +01:00 committed by Will Deacon
parent 63e3ee6154
commit 6460d7ba48
1 changed files with 9 additions and 3 deletions
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12
drivers/cpuidle/cpuidle-arm.c
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@ -105,11 +105,17 @@ static int __init arm_idle_init_cpu(int cpu)
ret = arm_cpuidle_init(cpu);
/*
* Allow the initialization to continue for other CPUs, if the reported
* failure is a HW misconfiguration/breakage (-ENXIO).
* Allow the initialization to continue for other CPUs, if the
* reported failure is a HW misconfiguration/breakage (-ENXIO).
*
* Some platforms do not support idle operations
* (arm_cpuidle_init() returning -EOPNOTSUPP), we should
* not flag this case as an error, it is a valid
* configuration.
*/
if (ret) {
pr_err("CPU %d failed to init idle CPU ops\n", cpu);
if (ret != -EOPNOTSUPP)
pr_err("CPU %d failed to init idle CPU ops\n", cpu);
ret = ret == -ENXIO ? 0 : ret;
goto out_kfree_drv;
}