From: Johan Hedberg <johan.hedberg@intel.com>
Date: Wed, 21 Oct 2015 15:03:00 +0000 (+0300)
Subject: Bluetooth: Add hci_conn_hash_lookup_le() helper function
X-Git-Tag: firefly_0821_release~176^2~818^2~43^2~24
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1b51c7b6e878a2df6fdb5bcf51f966eb46a330e0;p=firefly-linux-kernel-4.4.55.git

Bluetooth: Add hci_conn_hash_lookup_le() helper function

Many of the existing LE connection lookups are forced to use
hci_conn_hash_lookup_ba() which doesn't take into account the address
type. What's worse, most of the users don't bother checking that the
returned address type matches what was wanted.

This patch adds a new helper API to look up LE connections based on
their address and address type, paving the way to have the
hci_conn_hash_lookup_ba() users converted to do more precise lookups.

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

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0015d087d8b1..32bb281e6aa6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -794,6 +794,30 @@ static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 	return NULL;
 }
 
+static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
+						       bdaddr_t *ba,
+						       __u8 ba_type)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn  *c;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(c, &h->list, list) {
+		if (c->type != LE_LINK)
+		       continue;
+
+		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
+			rcu_read_unlock();
+			return c;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return NULL;
+}
+
 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 							__u8 type, __u16 state)
 {