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authorLan Tianyu <tianyu.lan@intel.com>2014-07-31 22:28:50 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-08-06 22:22:03 +0200
commitea9c167d93e6e2f4697f5061756f26356793cd95 (patch)
tree40edef11d556e794c9dda5e31bb37f491d26cd89 /drivers/acpi
parent515afdcba0880528fa8ae6fa63a14de6b9018770 (diff)
downloadop-kernel-dev-ea9c167d93e6e2f4697f5061756f26356793cd95.zip
op-kernel-dev-ea9c167d93e6e2f4697f5061756f26356793cd95.tar.gz
ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events
CPU hotplug happens during S2RAM and CPU notify event will be CPU_XXX_FROZEN. acpi_cpu_soft_notify() ignores to check these events. This also may make acpi_cpu_soft_notify() fall into sleep during CPU_DYING/STARTING_FROZEN events which don't allow callbacks to sleep. This patch is to fix it. Signed-off-by: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/processor_driver.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 4fcbd67..d9f7158 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -120,6 +120,7 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb,
unsigned int cpu = (unsigned long)hcpu;
struct acpi_processor *pr = per_cpu(processors, cpu);
struct acpi_device *device;
+ action &= ~CPU_TASKS_FROZEN;
/*
* CPU_STARTING and CPU_DYING must not sleep. Return here since
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