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

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 <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-04-30 09:35:37 -06:00 committed by Len Brown
parent 07a2039b8e
commit 6d27813100
2 changed files with 8 additions and 1 deletions
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6
drivers/acpi/bus.c
View File

@ -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);
}
/* --------------------------------------------------------------------------

3
include/acpi/acpi_bus.h
View File

@ -114,10 +114,13 @@ struct acpi_device_ops {
acpi_op_notify notify;
};
#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
struct acpi_driver {
char name[80];
char class[80];
const struct acpi_device_id *ids; /* Supported Hardware IDs */
unsigned int flags;
struct acpi_device_ops ops;
struct device_driver drv;
struct module *owner;