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ACPI: allow drivers to request both device and system notify events

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System notify events (0x00-0x7f) are common across all device types
and should be handled in Linux/ACPI, not in drivers.  However, some
BIOSes use system notify events in device-specific ways that require
the driver to be involved.

This patch adds a ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag.  When a
driver sets this flag and supplies a .notify method, Linux/ACPI calls
the .notify method for ALL notify events on the device, not just the
device-specific (0x80-0xff) events.

Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Bjorn Helgaas 2009-04-30 09:35:37 -06:00 • committed by Len Brown
commit 6d27813100
2 changed files with 8 additions and 1 deletions
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6
drivers/acpi/bus.c
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@ -549,6 +549,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
int result = 0;
struct acpi_device *device = NULL;
struct acpi_driver *driver;
blocking_notifier_call_chain(&acpi_bus_notify_list,
type, (void *)handle);
@ -629,7 +630,10 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
}
return;
driver = device->driver;
if (driver && driver->ops.notify &&
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
driver->ops.notify(device, type);
}
/* --------------------------------------------------------------------------