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authorBjorn Helgaas <bjorn.helgaas@hp.com>2009-09-21 13:35:19 -0600
committerLen Brown <len.brown@intel.com>2009-09-25 15:09:31 -0400
commit7f47fa6c2ff15f5e59cdbb350f86faef6829294a (patch)
tree02167bcbc5e6fd4eee044798ef142ff604d8eab1 /drivers/acpi/scan.c
parentb1fbfb2ae8f2f0e04219218da6f52f7313466899 (diff)
downloadlinux-linaro-android-7f47fa6c2ff15f5e59cdbb350f86faef6829294a.tar.gz
ACPI: maintain a single list of _HID and _CID IDs
There's no need to treat _HID and _CID differently. Keeping them in a single list makes code that uses the IDs a little simpler because it can just traverse the list rather than checking "do we have a HID?", "do we have any CIDs?" Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Reviewed-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c166
1 files changed, 46 insertions, 120 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 53b96e7a64a..2e8889f6266 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -45,6 +45,7 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
{
int len;
int count;
+ struct acpi_hardware_id *id;
if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids)
return -ENODEV;
@@ -52,33 +53,14 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
len = snprintf(modalias, size, "acpi:");
size -= len;
- if (acpi_dev->flags.hardware_id) {
- count = snprintf(&modalias[len], size, "%s:",
- acpi_dev->pnp.hardware_id);
+ list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
+ count = snprintf(&modalias[len], size, "%s:", id->id);
if (count < 0 || count >= size)
return -EINVAL;
len += count;
size -= count;
}
- if (acpi_dev->flags.compatible_ids) {
- struct acpica_device_id_list *cid_list;
- int i;
-
- cid_list = acpi_dev->pnp.cid_list;
- for (i = 0; i < cid_list->count; i++) {
- count = snprintf(&modalias[len], size, "%s:",
- cid_list->ids[i].string);
- if (count < 0 || count >= size) {
- printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size",
- acpi_dev->pnp.device_name, i);
- break;
- }
- len += count;
- size -= count;
- }
- }
-
modalias[len] = '\0';
return len;
}
@@ -273,6 +255,7 @@ int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids)
{
const struct acpi_device_id *id;
+ struct acpi_hardware_id *hwid;
/*
* If the device is not present, it is unnecessary to load device
@@ -281,40 +264,30 @@ int acpi_match_device_ids(struct acpi_device *device,
if (!device->status.present)
return -ENODEV;
- if (device->flags.hardware_id) {
- for (id = ids; id->id[0]; id++) {
- if (!strcmp((char*)id->id, device->pnp.hardware_id))
+ for (id = ids; id->id[0]; id++)
+ list_for_each_entry(hwid, &device->pnp.ids, list)
+ if (!strcmp((char *) id->id, hwid->id))
return 0;
- }
- }
-
- if (device->flags.compatible_ids) {
- struct acpica_device_id_list *cid_list = device->pnp.cid_list;
- int i;
-
- for (id = ids; id->id[0]; id++) {
- /* compare multiple _CID entries against driver ids */
- for (i = 0; i < cid_list->count; i++) {
- if (!strcmp((char*)id->id,
- cid_list->ids[i].string))
- return 0;
- }
- }
- }
return -ENOENT;
}
EXPORT_SYMBOL(acpi_match_device_ids);
+static void acpi_free_ids(struct acpi_device *device)
+{
+ struct acpi_hardware_id *id, *tmp;
+
+ list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) {
+ kfree(id->id);
+ kfree(id);
+ }
+}
+
static void acpi_device_release(struct device *dev)
{
struct acpi_device *acpi_dev = to_acpi_device(dev);
- kfree(acpi_dev->pnp.cid_list);
- if (acpi_dev->flags.hardware_id)
- kfree(acpi_dev->pnp.hardware_id);
- if (acpi_dev->flags.unique_id)
- kfree(acpi_dev->pnp.unique_id);
+ acpi_free_ids(acpi_dev);
kfree(acpi_dev);
}
@@ -1028,62 +1001,31 @@ static int acpi_dock_match(struct acpi_device *device)
return acpi_get_handle(device->handle, "_DCK", &tmp);
}
-static struct acpica_device_id_list*
-acpi_add_cid(
- struct acpi_device_info *info,
- struct acpica_device_id *new_cid)
+char *acpi_device_hid(struct acpi_device *device)
{
- struct acpica_device_id_list *cid;
- char *next_id_string;
- acpi_size cid_length;
- acpi_size new_cid_length;
- u32 i;
-
-
- /* Allocate new CID list with room for the new CID */
-
- if (!new_cid)
- new_cid_length = info->compatible_id_list.list_size;
- else if (info->compatible_id_list.list_size)
- new_cid_length = info->compatible_id_list.list_size +
- new_cid->length + sizeof(struct acpica_device_id);
- else
- new_cid_length = sizeof(struct acpica_device_id_list) + new_cid->length;
-
- cid = ACPI_ALLOCATE_ZEROED(new_cid_length);
- if (!cid) {
- return NULL;
- }
-
- cid->list_size = new_cid_length;
- cid->count = info->compatible_id_list.count;
- if (new_cid)
- cid->count++;
- next_id_string = (char *) cid->ids + (cid->count * sizeof(struct acpica_device_id));
-
- /* Copy all existing CIDs */
+ struct acpi_hardware_id *hid;
- for (i = 0; i < info->compatible_id_list.count; i++) {
- cid_length = info->compatible_id_list.ids[i].length;
- cid->ids[i].string = next_id_string;
- cid->ids[i].length = cid_length;
-
- ACPI_MEMCPY(next_id_string, info->compatible_id_list.ids[i].string,
- cid_length);
-
- next_id_string += cid_length;
- }
+ hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
+ return hid->id;
+}
+EXPORT_SYMBOL(acpi_device_hid);
- /* Append the new CID */
+static void acpi_add_id(struct acpi_device *device, const char *dev_id)
+{
+ struct acpi_hardware_id *id;
- if (new_cid) {
- cid->ids[i].string = next_id_string;
- cid->ids[i].length = new_cid->length;
+ id = kmalloc(sizeof(*id), GFP_KERNEL);
+ if (!id)
+ return;
- ACPI_MEMCPY(next_id_string, new_cid->string, new_cid->length);
+ id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL);
+ if (!id->id) {
+ kfree(id);
+ return;
}
- return cid;
+ strcpy(id->id, dev_id);
+ list_add_tail(&id->list, &device->pnp.ids);
}
static void acpi_device_set_id(struct acpi_device *device)
@@ -1094,6 +1036,7 @@ static void acpi_device_set_id(struct acpi_device *device)
struct acpica_device_id_list *cid_list = NULL;
char *cid_add = NULL;
acpi_status status;
+ int i;
switch (device->device_type) {
case ACPI_BUS_TYPE_DEVICE:
@@ -1166,15 +1109,9 @@ static void acpi_device_set_id(struct acpi_device *device)
hid = "device";
if (hid) {
- device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1);
- if (device->pnp.hardware_id) {
- strcpy(device->pnp.hardware_id, hid);
- device->flags.hardware_id = 1;
- }
+ acpi_add_id(device, hid);
+ device->flags.hardware_id = 1;
}
- if (!device->flags.hardware_id)
- device->pnp.hardware_id = "";
-
if (uid) {
device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1);
if (device->pnp.unique_id) {
@@ -1185,24 +1122,12 @@ static void acpi_device_set_id(struct acpi_device *device)
if (!device->flags.unique_id)
device->pnp.unique_id = "";
- if (cid_list || cid_add) {
- struct acpica_device_id_list *list;
-
- if (cid_add) {
- struct acpica_device_id cid;
- cid.length = strlen (cid_add) + 1;
- cid.string = cid_add;
-
- list = acpi_add_cid(info, &cid);
- } else {
- list = acpi_add_cid(info, NULL);
- }
-
- if (list) {
- device->pnp.cid_list = list;
- if (cid_add)
- device->flags.compatible_ids = 1;
- }
+ if (cid_list)
+ for (i = 0; i < cid_list->count; i++)
+ acpi_add_id(device, cid_list->ids[i].string);
+ if (cid_add) {
+ acpi_add_id(device, cid_add);
+ device->flags.compatible_ids = 1;
}
kfree(info);
@@ -1269,6 +1194,7 @@ 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);