[PATCH v2 3/7] drivers: cpu: Define CPU devices as IRQ safe
From: Lina Iyer <hidden>
Date: 2015-09-03 19:58:30
Also in:
linux-pm
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
CPUs may be powered off from CPUIdle or hotplug and are called with IRQ's disabled. Define CPU devices as IRQ safe, so they may be runtime suspended/resumed. Signed-off-by: Lina Iyer <redacted> --- drivers/base/cpu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 78720e7..56cb1d2 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c@@ -17,6 +17,7 @@ #include <linux/of.h> #include <linux/cpufeature.h> #include <linux/tick.h> +#include <linux/pm_runtime.h> #include "base.h"
@@ -371,10 +372,11 @@ int register_cpu(struct cpu *cpu, int num) if (cpu->hotpluggable) cpu->dev.groups = hotplugable_cpu_attr_groups; error = device_register(&cpu->dev); - if (!error) + if (!error) { + pm_runtime_irq_safe(&cpu->dev); per_cpu(cpu_sys_devices, num) = &cpu->dev; - if (!error) register_cpu_under_node(num, cpu_to_node(num)); + } return error; }
--
2.1.4