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ACPI / scan: Make it clear that acpi_bus_trim() cannot fail 

Since acpi_bus_trim() cannot fail, change its definition to a void
function, so that its callers don't check the return value in vain
and update the callers.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
This commit is contained in:
Rafael J. Wysocki 2013-01-26 00:27:44 +01:00
parent b8bd759acd
commit bfee26dba0
4 changed files with 9 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/acpi/dock.c
View File

@ -336,13 +336,9 @@ static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
static void dock_remove_acpi_device(acpi_handle handle)
{
struct acpi_device *device;
int ret;
if (!acpi_bus_get_device(handle, &device)) {
ret = acpi_bus_trim(device);
if (ret)
pr_debug("error removing bus, %x\n", -ret);
}
if (!acpi_bus_get_device(handle, &device))
acpi_bus_trim(device);
}
/**

12
drivers/acpi/scan.c
View File

@ -127,13 +127,8 @@ void acpi_bus_hot_remove_device(void *context)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Hot-removing device %s...\n", dev_name(&device->dev)));
if (acpi_bus_trim(device)) {
printk(KERN_ERR PREFIX
"Removing device failed\n");
goto err_out;
}
/* device has been freed */
acpi_bus_trim(device);
/* Device node has been released. */
device = NULL;
/* power off device */
@ -1631,7 +1626,7 @@ static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used,
return AE_OK;
}
int acpi_bus_trim(struct acpi_device *start)
void acpi_bus_trim(struct acpi_device *start)
{
/*
* Execute acpi_bus_device_detach() as a post-order callback to detach
@ -1647,7 +1642,6 @@ int acpi_bus_trim(struct acpi_device *start)
acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL,
acpi_bus_remove, NULL, NULL);
acpi_bus_remove(start->handle, 0, NULL, NULL);
return 0;
}
EXPORT_SYMBOL_GPL(acpi_bus_trim);

10
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -742,8 +742,7 @@ static int acpiphp_bus_add(struct acpiphp_func *func)
/* this shouldn't be in here, so remove
* the bus then re-add it...
*/
ret_val = acpi_bus_trim(device);
dbg("acpi_bus_trim return %x\n", ret_val);
acpi_bus_trim(device);
}
ret_val = acpi_bus_scan(func->handle);
@ -772,11 +771,8 @@ static int acpiphp_bus_trim(acpi_handle handle)
return retval;
}
retval = acpi_bus_trim(device);
if (retval)
err("cannot remove from acpi list\n");
return retval;
acpi_bus_trim(device);
return 0;
}
static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)

2
include/acpi/acpi_bus.h
View File

@ -348,7 +348,7 @@ int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_hot_remove_device(void *context);
int acpi_bus_trim(struct acpi_device *start);
void acpi_bus_trim(struct acpi_device *start);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);