diff options
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2009-04-30 09:35:37 -0600 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-06-18 00:13:14 -0400 |
| commit | 6d2781310036a8d3fa2b590a6f83a298010fd64a (patch) | |
| tree | b10f1e9b275aed0a666786421f636f6fae5cb661 | |
| parent | 07a2039b8eb0af4ff464efd3dfd95de5c02648c6 (diff) | |
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>
| -rw-r--r-- | drivers/acpi/bus.c | 6 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index ae862f1798d..cdfecc0a2ac 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -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); } /* -------------------------------------------------------------------------- diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index c34b1102290..84e35d5646a 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -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; |