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Subject[PATCH 1/7] ACPI / scan: Introduce acpi_scan_match_handler()
Date
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Introduce helper routine acpi_scan_match_handler() that will find the
ACPI scan handler matching a given device ID, if there is one, and
rework acpi_scan_attach_handler() to use the new routine (that
routine will also be useful for other purposes going forward).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/scan.c | 53 +++++++++++++++++++++++++++-------------------------
1 file changed, 28 insertions(+), 25 deletions(-)

Index: test/drivers/acpi/scan.c
===================================================================
--- test.orig/drivers/acpi/scan.c
+++ test/drivers/acpi/scan.c
@@ -1529,6 +1529,25 @@ static int acpi_bus_type_and_status(acpi
return 0;
}

+static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr,
+ const struct acpi_device_id **matchid)
+{
+ struct acpi_scan_handler *handler;
+
+ list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
+ const struct acpi_device_id *devid;
+
+ for (devid = handler->ids; devid->id[0]; devid++)
+ if (!strcmp((char *)devid->id, idstr)) {
+ if (matchid)
+ *matchid = devid;
+
+ return handler;
+ }
+ }
+ return NULL;
+}
+
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
void *not_used, void **return_value)
{
@@ -1576,42 +1595,26 @@ static acpi_status acpi_bus_check_add(ac
return AE_OK;
}

-static int acpi_scan_do_attach_handler(struct acpi_device *device, char *id)
+static int acpi_scan_attach_handler(struct acpi_device *device)
{
- struct acpi_scan_handler *handler;
+ struct acpi_hardware_id *hwid;
+ int ret = 0;

- list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
+ list_for_each_entry(hwid, &device->pnp.ids, list) {
const struct acpi_device_id *devid;
+ struct acpi_scan_handler *handler;

- for (devid = handler->ids; devid->id[0]; devid++) {
- int ret;
-
- if (strcmp((char *)devid->id, id))
- continue;
-
+ handler = acpi_scan_match_handler(hwid->id, &devid);
+ if (handler) {
ret = handler->attach(device, devid);
if (ret > 0) {
device->handler = handler;
- return ret;
+ break;
} else if (ret < 0) {
- return ret;
+ break;
}
}
}
- return 0;
-}
-
-static int acpi_scan_attach_handler(struct acpi_device *device)
-{
- struct acpi_hardware_id *hwid;
- int ret = 0;
-
- list_for_each_entry(hwid, &device->pnp.ids, list) {
- ret = acpi_scan_do_attach_handler(device, hwid->id);
- if (ret)
- break;
-
- }
return ret;
}



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