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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-03 00:26:16 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-12 14:14:24 +0200
commit683058e315f00a216fd6c79df4f63bc9945ca434 (patch)
treee4b143220938ebb24a7bf72f286f275090b2afef /drivers/acpi/internal.h
parent0902a9044fa5b7a0456ea4daacec2c2b3189ba8c (diff)
downloadop-kernel-dev-683058e315f00a216fd6c79df4f63bc9945ca434.zip
op-kernel-dev-683058e315f00a216fd6c79df4f63bc9945ca434.tar.gz
ACPI / hotplug: Use device offline/online for graceful hot-removal
Modify the generic ACPI hotplug code to be able to check if devices scheduled for hot-removal may be gracefully removed from the system using the device offline/online mechanism introduced previously. Namely, make acpi_scan_hot_remove() handling device hot-removal call device_offline() for all physical companions of the ACPI device nodes involved in the operation and check the results. If any of the device_offline() calls fails, the function will not progress to the removal phase (which cannot be aborted), unless its (new) force argument is set (in case of a failing offline it will put the devices offlined by it back online). In support of 'forced' device hot-removal, add a new sysfs attribute 'force_remove' that will reside under /sys/firmware/acpi/hotplug/. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Toshi Kani <toshi.kani@hp.com>
Diffstat (limited to 'drivers/acpi/internal.h')
-rw-r--r--drivers/acpi/internal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 6f1afd9..4548f0a 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -47,6 +47,8 @@ void acpi_memory_hotplug_init(void);
static inline void acpi_memory_hotplug_init(void) {}
#endif
+extern bool acpi_force_hot_remove;
+
void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
const char *name);
int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
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