Even if cpu_down() fails, acpi_processor_remove() continues to remove the cpu.
But in this case, it should return error number since some process may run on
the cpu. If the cpu has a running process and the cpu is turned the power off,
the system may not work well.
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Toshi Kani <toshi.kani@xxxxxx>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
---
drivers/acpi/processor_driver.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
Index: linux-3.6-rc7/drivers/acpi/processor_driver.c
===================================================================
--- linux-3.6-rc7.orig/drivers/acpi/processor_driver.c 2012-09-24 10:10:57.000000000 +0900
+++ linux-3.6-rc7/drivers/acpi/processor_driver.c 2012-09-28 19:16:33.207858261 +0900
@@ -605,7 +605,7 @@ err_free_pr:
static int acpi_processor_remove(struct acpi_device *device, int type)
{
struct acpi_processor *pr = NULL;
-
+ int ret;
if (!device || !acpi_driver_data(device))
return -EINVAL;
@@ -616,8 +616,9 @@ static int acpi_processor_remove(struct
goto free;
if (type == ACPI_BUS_REMOVAL_EJECT) {
- if (acpi_processor_handle_eject(pr))
- return -EINVAL;
+ ret = acpi_processor_handle_eject(pr);
+ if (ret)
+ return ret;
}
acpi_processor_power_exit(pr, device);
@@ -848,12 +849,17 @@ static acpi_status acpi_processor_hotadd
static int acpi_processor_handle_eject(struct acpi_processor *pr)
{
- if (cpu_online(pr->id))
- cpu_down(pr->id);
+ int ret = 0;
+
+ if (cpu_online(pr->id)) {
+ ret = cpu_down(pr->id);
+ if (ret)
+ return ret;
+ }
arch_unregister_cpu(pr->id);
acpi_unmap_lsapic(pr->id);
- return (0);
+ return ret;
}
#else
static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr)
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
