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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-04 01:35:20 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-04 17:23:40 +0400 |
| commit | 53540098b23c3884b4a0b4f220b9d977bc496af3 (patch) | |
| tree | fe86061c4772efaa92fbe68920f803ae4280b2d0 /drivers/pnp | |
| parent | 9b27516fcd7ab7dc416edf418446c24c61729938 (diff) | |
| download | linux-53540098b23c3884b4a0b4f220b9d977bc496af3.tar.xz | |
ACPI / glue: Add .match() callback to struct acpi_bus_type
USB uses the .find_bridge() callback from struct acpi_bus_type
incorrectly, because as a result of the way it is used by USB every
device in the system that doesn't have a bus type or parent is
passed to usb_acpi_find_device() for inspection.
What USB actually needs, though, is to call usb_acpi_find_device()
for USB ports that don't have a bus type defined, but have
usb_port_device_type as their device type, as well as for USB
devices.
To fix that replace the struct bus_type pointer in struct
acpi_bus_type used for matching devices to specific subsystems
with a .match() callback to be used for this purpose and update
the users of struct acpi_bus_type, including USB, accordingly.
Define the .match() callback routine for USB, usb_acpi_bus_match(),
in such a way that it will cover both USB devices and USB ports
and remove the now redundant .find_bridge() callback pointer from
usb_acpi_bus.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/pnp')
| -rw-r--r-- | drivers/pnp/pnpacpi/core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c index 8813fc03aa09..55cd459a3908 100644 --- a/drivers/pnp/pnpacpi/core.c +++ b/drivers/pnp/pnpacpi/core.c @@ -353,8 +353,14 @@ static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) /* complete initialization of a PNPACPI device includes having * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. */ +static bool acpi_pnp_bus_match(struct device *dev) +{ + return dev->bus == &pnp_bus_type; +} + static struct acpi_bus_type __initdata acpi_pnp_bus = { - .bus = &pnp_bus_type, + .name = "PNP", + .match = acpi_pnp_bus_match, .find_device = acpi_pnp_find_device, }; |