Bluetooth: Convert inquiry cache to use standard list types

This makes it possible to use the convenience functions provided for
standard kernel list types and it also makes it easier to extend the use
of the cache for the management interface where e.g. name resolving
control will be needed.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 18 insertions, 15 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 845da3e..feeea4d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -357,15 +357,11 @@ struct hci_dev *hci_dev_get(int index)
 /* ---- Inquiry support ---- */
 static void inquiry_cache_flush(struct hci_dev *hdev)
 {
-	struct inquiry_cache *cache = &hdev->inq_cache;
-	struct inquiry_entry *next  = cache->list, *e;
-
-	BT_DBG("cache %p", cache);
+	struct inquiry_entry *p, *n;
 
-	cache->list = NULL;
-	while ((e = next)) {
-		next = e->next;
-		kfree(e);
+	list_for_each_entry_safe(p, n, &hdev->inq_cache.list, list) {
+		list_del(&p->list);
+		kfree(p);
 	}
 }
 
@@ -376,10 +372,12 @@ struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *b
 
 	BT_DBG("cache %p, %s", cache, batostr(bdaddr));
 
-	for (e = cache->list; e; e = e->next)
+	list_for_each_entry(e, &cache->list, list) {
 		if (!bacmp(&e->data.bdaddr, bdaddr))
-			break;
-	return e;
+			return e;
+	}
+
+	return NULL;
 }
 
 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
@@ -396,8 +394,7 @@ void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
 		if (!ie)
 			return;
 
-		ie->next = cache->list;
-		cache->list = ie;
+		list_add(&ie->list, &cache->list);
 	}
 
 	memcpy(&ie->data, data, sizeof(*data));
@@ -412,15 +409,21 @@ static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
 	struct inquiry_entry *e;
 	int copied = 0;
 
-	for (e = cache->list; e && copied < num; e = e->next, copied++) {
+	list_for_each_entry(e, &cache->list, list) {
 		struct inquiry_data *data = &e->data;
+
+		if (copied >= num)
+			break;
+
 		bacpy(&info->bdaddr, &data->bdaddr);
 		info->pscan_rep_mode	= data->pscan_rep_mode;
 		info->pscan_period_mode	= data->pscan_period_mode;
 		info->pscan_mode	= data->pscan_mode;
 		memcpy(info->dev_class, data->dev_class, 3);
 		info->clock_offset	= data->clock_offset;
+
 		info++;
+		copied++;
 	}
 
 	BT_DBG("cache %p, copied %d", cache, copied);
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 5210956..ed9ccee 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -388,7 +388,7 @@ static int inquiry_cache_show(struct seq_file *f, void *p)
 
 	hci_dev_lock(hdev);
 
-	for (e = cache->list; e; e = e->next) {
+	list_for_each_entry(e, &cache->list, list) {
 		struct inquiry_data *data = &e->data;
 		seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
 			   batostr(&data->bdaddr),