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path: root/drivers/acpi/scan.c
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Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c178
1 files changed, 61 insertions, 117 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index c6d60910e8a8..02629a810c04 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -472,6 +472,7 @@ static void acpi_free_ids(struct acpi_device *device)
kfree(id->id);
kfree(id);
}
+ kfree(device->pnp.unique_id);
}
static void acpi_device_release(struct device *dev)
@@ -479,7 +480,6 @@ static void acpi_device_release(struct device *dev)
struct acpi_device *acpi_dev = to_acpi_device(dev);
acpi_free_ids(acpi_dev);
- kfree(acpi_dev->pnp.unique_id);
kfree(acpi_dev);
}
@@ -623,6 +623,18 @@ static int acpi_device_register(struct acpi_device *device)
struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
int found = 0;
+ if (device->handle) {
+ acpi_status status;
+
+ status = acpi_attach_data(device->handle, acpi_bus_data_handler,
+ device);
+ if (ACPI_FAILURE(status)) {
+ acpi_handle_err(device->handle,
+ "Unable to attach device data\n");
+ return -ENODEV;
+ }
+ }
+
/*
* Linkage
* -------
@@ -637,8 +649,9 @@ static int acpi_device_register(struct acpi_device *device)
new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
if (!new_bus_id) {
- printk(KERN_ERR PREFIX "Memory allocation error\n");
- return -ENOMEM;
+ pr_err(PREFIX "Memory allocation error\n");
+ result = -ENOMEM;
+ goto err_detach;
}
mutex_lock(&acpi_device_lock);
@@ -677,7 +690,7 @@ static int acpi_device_register(struct acpi_device *device)
result = device_register(&device->dev);
if (result) {
dev_err(&device->dev, "Error registering device\n");
- goto end;
+ goto err;
}
result = acpi_device_setup_files(device);
@@ -687,12 +700,16 @@ static int acpi_device_register(struct acpi_device *device)
device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
return 0;
-end:
+
+ err:
mutex_lock(&acpi_device_lock);
if (device->parent)
list_del(&device->node);
list_del(&device->wakeup_list);
mutex_unlock(&acpi_device_lock);
+
+ err_detach:
+ acpi_detach_data(device->handle, acpi_bus_data_handler);
return result;
}
@@ -857,12 +874,6 @@ void acpi_bus_data_handler(acpi_handle handle, void *context)
return;
}
-static int acpi_bus_get_perf_flags(struct acpi_device *device)
-{
- device->performance.state = ACPI_STATE_UNKNOWN;
- return 0;
-}
-
static acpi_status
acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
struct acpi_device_wakeup *wakeup)
@@ -1013,12 +1024,25 @@ static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
static void acpi_bus_add_power_resource(acpi_handle handle);
-static int acpi_bus_get_power_flags(struct acpi_device *device)
+static void acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status = 0;
acpi_handle handle = NULL;
u32 i = 0;
+ /* Power resources cannot be power manageable. */
+ if (device->device_type == ACPI_BUS_TYPE_POWER)
+ return;
+
+ /* Presence of _PS0|_PR0 indicates 'power manageable' */
+ status = acpi_get_handle(device->handle, "_PS0", &handle);
+ if (ACPI_FAILURE(status)) {
+ status = acpi_get_handle(device->handle, "_PR0", &handle);
+ if (ACPI_FAILURE(status))
+ return;
+ }
+
+ device->flags.power_manageable = 1;
/*
* Power Management Flags
@@ -1084,16 +1108,13 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1;
acpi_bus_init_power(device);
-
- return 0;
}
-static int acpi_bus_get_flags(struct acpi_device *device)
+static void acpi_bus_get_flags(struct acpi_device *device)
{
acpi_status status = AE_OK;
acpi_handle temp = NULL;
-
/* Presence of _STA indicates 'dynamic_status' */
status = acpi_get_handle(device->handle, "_STA", &temp);
if (ACPI_SUCCESS(status))
@@ -1113,21 +1134,6 @@ static int acpi_bus_get_flags(struct acpi_device *device)
if (ACPI_SUCCESS(status))
device->flags.ejectable = 1;
}
-
- /* Power resources cannot be power manageable. */
- if (device->device_type == ACPI_BUS_TYPE_POWER)
- return 0;
-
- /* Presence of _PS0|_PR0 indicates 'power manageable' */
- status = acpi_get_handle(device->handle, "_PS0", &temp);
- if (ACPI_FAILURE(status))
- status = acpi_get_handle(device->handle, "_PR0", &temp);
- if (ACPI_SUCCESS(status))
- device->flags.power_manageable = 1;
-
- /* TBD: Performance management */
-
- return 0;
}
static void acpi_device_get_busid(struct acpi_device *device)
@@ -1352,27 +1358,18 @@ static void acpi_device_set_id(struct acpi_device *device)
}
}
-static int acpi_device_set_context(struct acpi_device *device)
+static void acpi_init_device_object(struct acpi_device *device,
+ acpi_handle handle,
+ int type, unsigned long long sta)
{
- acpi_status status;
-
- /*
- * Context
- * -------
- * Attach this 'struct acpi_device' to the ACPI object. This makes
- * resolutions from handle->device very efficient. Fixed hardware
- * devices have no handles, so we skip them.
- */
- if (!device->handle)
- return 0;
-
- status = acpi_attach_data(device->handle,
- acpi_bus_data_handler, device);
- if (ACPI_SUCCESS(status))
- return 0;
-
- printk(KERN_ERR PREFIX "Error attaching device data\n");
- return -ENODEV;
+ INIT_LIST_HEAD(&device->pnp.ids);
+ device->device_type = type;
+ device->handle = handle;
+ device->parent = acpi_bus_get_parent(handle);
+ STRUCT_TO_INT(device->status) = sta;
+ acpi_device_get_busid(device);
+ acpi_device_set_id(device);
+ acpi_bus_get_flags(device);
}
static int acpi_add_single_object(struct acpi_device **child,
@@ -1389,78 +1386,25 @@ static int acpi_add_single_object(struct acpi_device **child,
return -ENOMEM;
}
- INIT_LIST_HEAD(&device->pnp.ids);
- device->device_type = type;
- device->handle = handle;
- device->parent = acpi_bus_get_parent(handle);
- STRUCT_TO_INT(device->status) = sta;
-
- acpi_device_get_busid(device);
-
- /*
- * Flags
- * -----
- * Note that we only look for object handles -- cannot evaluate objects
- * until we know the device is present and properly initialized.
- */
- result = acpi_bus_get_flags(device);
- if (result)
- goto end;
-
- /*
- * Initialize Device
- * -----------------
- * TBD: Synch with Core's enumeration/initialization process.
- */
- acpi_device_set_id(device);
-
- /*
- * Power Management
- * ----------------
- */
- if (device->flags.power_manageable) {
- result = acpi_bus_get_power_flags(device);
- if (result)
- goto end;
- }
-
- /*
- * Wakeup device management
- *-----------------------
- */
+ acpi_init_device_object(device, handle, type, sta);
+ acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);
- /*
- * Performance Management
- * ----------------------
- */
- if (device->flags.performance_manageable) {
- result = acpi_bus_get_perf_flags(device);
- if (result)
- goto end;
- }
-
- if ((result = acpi_device_set_context(device)))
- goto end;
-
device->flags.match_driver = match_driver;
result = acpi_device_register(device);
-
-end:
- if (!result) {
- acpi_power_add_remove_device(device, true);
- acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Adding %s [%s] parent %s\n", dev_name(&device->dev),
- (char *) buffer.pointer,
- device->parent ? dev_name(&device->parent->dev) :
- "(null)"));
- kfree(buffer.pointer);
- *child = device;
- } else
+ if (result) {
acpi_device_release(&device->dev);
+ return result;
+ }
- return result;
+ acpi_power_add_remove_device(device, true);
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n",
+ dev_name(&device->dev), (char *) buffer.pointer,
+ device->parent ? dev_name(&device->parent->dev) : "(null)"));
+ kfree(buffer.pointer);
+ *child = device;
+ return 0;
}
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \