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path: root/drivers/acpi/glue.c
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Diffstat (limited to 'drivers/acpi/glue.c')
-rw-r--r--drivers/acpi/glue.c56
1 files changed, 39 insertions, 17 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 08373086cd7e..01551840d236 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -130,46 +130,59 @@ static int acpi_bind_one(struct device *dev, acpi_handle handle)
{
struct acpi_device *acpi_dev;
acpi_status status;
- struct acpi_device_physical_node *physical_node;
+ struct acpi_device_physical_node *physical_node, *pn;
char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2];
int retval = -EINVAL;
- if (dev->archdata.acpi_handle) {
- dev_warn(dev, "Drivers changed 'acpi_handle'\n");
- return -EINVAL;
+ if (ACPI_HANDLE(dev)) {
+ if (handle) {
+ dev_warn(dev, "ACPI handle is already set\n");
+ return -EINVAL;
+ } else {
+ handle = ACPI_HANDLE(dev);
+ }
}
+ if (!handle)
+ return -EINVAL;
get_device(dev);
status = acpi_bus_get_device(handle, &acpi_dev);
if (ACPI_FAILURE(status))
goto err;
- physical_node = kzalloc(sizeof(struct acpi_device_physical_node),
- GFP_KERNEL);
+ physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
if (!physical_node) {
retval = -ENOMEM;
goto err;
}
mutex_lock(&acpi_dev->physical_node_lock);
+
+ /* Sanity check. */
+ list_for_each_entry(pn, &acpi_dev->physical_node_list, node)
+ if (pn->dev == dev) {
+ dev_warn(dev, "Already associated with ACPI node\n");
+ goto err_free;
+ }
+
/* allocate physical node id according to physical_node_id_bitmap */
physical_node->node_id =
find_first_zero_bit(acpi_dev->physical_node_id_bitmap,
ACPI_MAX_PHYSICAL_NODE);
if (physical_node->node_id >= ACPI_MAX_PHYSICAL_NODE) {
retval = -ENOSPC;
- mutex_unlock(&acpi_dev->physical_node_lock);
- kfree(physical_node);
- goto err;
+ goto err_free;
}
set_bit(physical_node->node_id, acpi_dev->physical_node_id_bitmap);
physical_node->dev = dev;
list_add_tail(&physical_node->node, &acpi_dev->physical_node_list);
acpi_dev->physical_node_count++;
+
mutex_unlock(&acpi_dev->physical_node_lock);
- dev->archdata.acpi_handle = handle;
+ if (!ACPI_HANDLE(dev))
+ ACPI_HANDLE_SET(dev, acpi_dev->handle);
if (!physical_node->node_id)
strcpy(physical_node_name, PHYSICAL_NODE_STRING);
@@ -187,8 +200,14 @@ static int acpi_bind_one(struct device *dev, acpi_handle handle)
return 0;
err:
+ ACPI_HANDLE_SET(dev, NULL);
put_device(dev);
return retval;
+
+ err_free:
+ mutex_unlock(&acpi_dev->physical_node_lock);
+ kfree(physical_node);
+ goto err;
}
static int acpi_unbind_one(struct device *dev)
@@ -198,11 +217,10 @@ static int acpi_unbind_one(struct device *dev)
acpi_status status;
struct list_head *node, *next;
- if (!dev->archdata.acpi_handle)
+ if (!ACPI_HANDLE(dev))
return 0;
- status = acpi_bus_get_device(dev->archdata.acpi_handle,
- &acpi_dev);
+ status = acpi_bus_get_device(ACPI_HANDLE(dev), &acpi_dev);
if (ACPI_FAILURE(status))
goto err;
@@ -228,7 +246,7 @@ static int acpi_unbind_one(struct device *dev)
sysfs_remove_link(&acpi_dev->dev.kobj, physical_node_name);
sysfs_remove_link(&dev->kobj, "firmware_node");
- dev->archdata.acpi_handle = NULL;
+ ACPI_HANDLE_SET(dev, NULL);
/* acpi_bind_one increase refcnt by one */
put_device(dev);
kfree(entry);
@@ -248,6 +266,10 @@ static int acpi_platform_notify(struct device *dev)
acpi_handle handle;
int ret = -EINVAL;
+ ret = acpi_bind_one(dev, NULL);
+ if (!ret)
+ goto out;
+
if (!dev->bus || !dev->parent) {
/* bridge devices genernally haven't bus or parent */
ret = acpi_find_bridge_device(dev, &handle);
@@ -261,16 +283,16 @@ static int acpi_platform_notify(struct device *dev)
}
if ((ret = type->find_device(dev, &handle)) != 0)
DBG("Can't get handler for %s\n", dev_name(dev));
- end:
+ end:
if (!ret)
acpi_bind_one(dev, handle);
+ out:
#if ACPI_GLUE_DEBUG
if (!ret) {
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- acpi_get_name(dev->archdata.acpi_handle,
- ACPI_FULL_PATHNAME, &buffer);
+ acpi_get_name(dev->acpi_handle, ACPI_FULL_PATHNAME, &buffer);
DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
kfree(buffer.pointer);
} else