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| author |  Lukas Wunner <lukas@wunner.de>
| 2015-11-25 21:19:55 +0100 |
|---|---|---|
| committer |  Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| 2015-12-09 01:31:41 +0100 |
| commit | 2d12b6b381ba059d5f92798f5ea739672a2f5fcf (patch) | |
| tree | 43b44ae5508885d7170fc074d394f9e4aad7ca0b /drivers/acpi/scan.c | |
| parent | ACPI / scan: Fix acpi_bus_id_list bookkeeping (diff) | |
| download | linux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.tar.gz linux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.tar.bz2 linux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.zip | |
ACPI / utils: Add acpi_dev_present()
There's an idiom in use by 7 Linux drivers to detect the presence of a
particular ACPI HID by walking the namespace with acpi_get_devices().
The callback passed to acpi_get_devices() is mostly identical across
the drivers, leading to lots of duplicate code.
Add acpi_dev_present(), the ACPI equivalent to pci_dev_present(),
allowing us to deduplicate all that boilerplate in the drivers.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index be1fc12a17ee..407a3760e8de 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -39,7 +39,7 @@ static const char *dummy_hid = "device"; static LIST_HEAD(acpi_dep_list); static DEFINE_MUTEX(acpi_dep_list_lock); -static LIST_HEAD(acpi_bus_id_list); +LIST_HEAD(acpi_bus_id_list); static DEFINE_MUTEX(acpi_scan_lock); static LIST_HEAD(acpi_scan_handlers_list); DEFINE_MUTEX(acpi_device_lock); @@ -52,12 +52,6 @@ struct acpi_dep_data { acpi_handle slave; }; -struct acpi_device_bus_id{ - char bus_id[15]; - unsigned int instance_no; - struct list_head node; -}; - void acpi_scan_lock_acquire(void) { mutex_lock(&acpi_scan_lock); |