Bluetooth: Replace spin_lock by mutex in hci_dev

Now we run everything in HCI in process context, so it's a better idea use
mutex instead spin_lock. The macro remains hci_dev_lock() (and I got rid
of hci_dev_lock_bh()), of course.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

include/net/bluetooth/hci_core.h

@@ -117,7 +117,7 @@ struct adv_entry {
 #define NUM_REASSEMBLY 4
 struct hci_dev {
 	struct list_head list;
-	spinlock_t	lock;
+	struct mutex	lock;
 	atomic_t	refcnt;
 
 	char		name[8];
@@ -566,10 +566,8 @@ static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 	return NULL;
 }
 
-#define hci_dev_lock(d)		spin_lock(&d->lock)
-#define hci_dev_unlock(d)	spin_unlock(&d->lock)
-#define hci_dev_lock_bh(d)	spin_lock_bh(&d->lock)
-#define hci_dev_unlock_bh(d)	spin_unlock_bh(&d->lock)
+#define hci_dev_lock(d)		mutex_lock(&d->lock)
+#define hci_dev_unlock(d)	mutex_unlock(&d->lock)
 
 struct hci_dev *hci_dev_get(int index);
 struct hci_dev *hci_get_route(bdaddr_t *src, bdaddr_t *dst);

net/bluetooth/hci_conn.c

@@ -876,7 +876,7 @@ int hci_get_conn_list(void __user *arg)
 
 	ci = cl->conn_info;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	list_for_each_entry(c, &hdev->conn_hash.list, list) {
 		bacpy(&(ci + n)->bdaddr, &c->dst);
 		(ci + n)->handle = c->handle;
@@ -887,7 +887,7 @@ int hci_get_conn_list(void __user *arg)
 		if (++n >= req.conn_num)
 			break;
 	}
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	cl->dev_id = hdev->id;
 	cl->conn_num = n;
@@ -911,7 +911,7 @@ int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&req, arg, sizeof(req)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
 	if (conn) {
 		bacpy(&ci.bdaddr, &conn->dst);
@@ -921,7 +921,7 @@ int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
 		ci.state = conn->state;
 		ci.link_mode = conn->link_mode;
 	}
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	if (!conn)
 		return -ENOENT;
@@ -937,11 +937,11 @@ int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&req, arg, sizeof(req)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
 	if (conn)
 		req.type = conn->auth_type;
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	if (!conn)
 		return -ENOENT;

net/bluetooth/hci_core.c

@@ -433,14 +433,14 @@ int hci_inquiry(void __user *arg)
 	if (!hdev)
 		return -ENODEV;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
 				inquiry_cache_empty(hdev) ||
 				ir.flags & IREQ_CACHE_FLUSH) {
 		inquiry_cache_flush(hdev);
 		do_inquiry = 1;
 	}
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	timeo = ir.length * msecs_to_jiffies(2000);
 
@@ -462,9 +462,9 @@ int hci_inquiry(void __user *arg)
 		goto done;
 	}
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	BT_DBG("num_rsp %d", ir.num_rsp);
 
@@ -541,9 +541,9 @@ int hci_dev_open(__u16 dev)
 		set_bit(HCI_UP, &hdev->flags);
 		hci_notify(hdev, HCI_DEV_UP);
 		if (!test_bit(HCI_SETUP, &hdev->flags)) {
-			hci_dev_lock_bh(hdev);
+			hci_dev_lock(hdev);
 			mgmt_powered(hdev, 1);
-			hci_dev_unlock_bh(hdev);
+			hci_dev_unlock(hdev);
 		}
 	} else {
 		/* Init failed, cleanup */
@@ -597,10 +597,10 @@ static int hci_dev_do_close(struct hci_dev *hdev)
 	if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags))
 		cancel_delayed_work(&hdev->power_off);
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	inquiry_cache_flush(hdev);
 	hci_conn_hash_flush(hdev);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	hci_notify(hdev, HCI_DEV_DOWN);
 
@@ -636,9 +636,9 @@ static int hci_dev_do_close(struct hci_dev *hdev)
 	 * and no tasks are scheduled. */
 	hdev->close(hdev);
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	mgmt_powered(hdev, 0);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	/* Clear flags */
 	hdev->flags = 0;
@@ -681,10 +681,10 @@ int hci_dev_reset(__u16 dev)
 	skb_queue_purge(&hdev->rx_q);
 	skb_queue_purge(&hdev->cmd_q);
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	inquiry_cache_flush(hdev);
 	hci_conn_hash_flush(hdev);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	if (hdev->flush)
 		hdev->flush(hdev);
@@ -967,13 +967,13 @@ static void hci_discov_off(struct work_struct *work)
 
 	BT_DBG("%s", hdev->name);
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
 
 	hdev->discov_timeout = 0;
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 }
 
 int hci_uuids_clear(struct hci_dev *hdev)
@@ -1443,7 +1443,7 @@ int hci_register_dev(struct hci_dev *hdev)
 	list_add_tail(&hdev->list, head);
 
 	atomic_set(&hdev->refcnt, 1);
-	spin_lock_init(&hdev->lock);
+	mutex_init(&hdev->lock);
 
 	hdev->flags = 0;
 	hdev->dev_flags = 0;
@@ -1558,9 +1558,9 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
 	if (!test_bit(HCI_INIT, &hdev->flags) &&
 					!test_bit(HCI_SETUP, &hdev->flags)) {
-		hci_dev_lock_bh(hdev);
+		hci_dev_lock(hdev);
 		mgmt_index_removed(hdev);
-		hci_dev_unlock_bh(hdev);
+		hci_dev_unlock(hdev);
 	}
 
 	/* mgmt_index_removed should take care of emptying the
@@ -1580,13 +1580,13 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
 	destroy_workqueue(hdev->workqueue);
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	hci_blacklist_clear(hdev);
 	hci_uuids_clear(hdev);
 	hci_link_keys_clear(hdev);
 	hci_remote_oob_data_clear(hdev);
 	hci_adv_entries_clear(hdev);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	__hci_dev_put(hdev);
 }

net/bluetooth/hci_sock.c

@@ -188,11 +188,11 @@ static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	err = hci_blacklist_add(hdev, &bdaddr);
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return err;
 }
@@ -205,11 +205,11 @@ static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	err = hci_blacklist_del(hdev, &bdaddr);
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return err;
 }

net/bluetooth/hci_sysfs.c

@@ -402,7 +402,7 @@ static int inquiry_cache_show(struct seq_file *f, void *p)
 	struct inquiry_cache *cache = &hdev->inq_cache;
 	struct inquiry_entry *e;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	for (e = cache->list; e; e = e->next) {
 		struct inquiry_data *data = &e->data;
@@ -415,7 +415,7 @@ static int inquiry_cache_show(struct seq_file *f, void *p)
 			   data->rssi, data->ssp_mode, e->timestamp);
 	}
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return 0;
 }
@@ -437,12 +437,12 @@ static int blacklist_show(struct seq_file *f, void *p)
 	struct hci_dev *hdev = f->private;
 	struct bdaddr_list *b;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	list_for_each_entry(b, &hdev->blacklist, list)
 		seq_printf(f, "%s\n", batostr(&b->bdaddr));
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return 0;
 }
@@ -481,12 +481,12 @@ static int uuids_show(struct seq_file *f, void *p)
 	struct hci_dev *hdev = f->private;
 	struct bt_uuid *uuid;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	list_for_each_entry(uuid, &hdev->uuids, list)
 		print_bt_uuid(f, uuid->uuid);
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return 0;
 }
@@ -507,11 +507,11 @@ static int auto_accept_delay_set(void *data, u64 val)
 {
 	struct hci_dev *hdev = data;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	hdev->auto_accept_delay = val;
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return 0;
 }
@@ -520,11 +520,11 @@ static int auto_accept_delay_get(void *data, u64 *val)
 {
 	struct hci_dev *hdev = data;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	*val = hdev->auto_accept_delay;
 
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	return 0;
 }

net/bluetooth/hidp/core.c

@@ -795,11 +795,11 @@ static struct hci_conn *hidp_get_connection(struct hidp_session *session)
 	if (!hdev)
 		return NULL;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
 	if (conn)
 		hci_conn_hold_device(conn);
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	hci_dev_put(hdev);
 

net/bluetooth/l2cap_core.c

@@ -1171,7 +1171,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan)
 	if (!hdev)
 		return -EHOSTUNREACH;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	auth_type = l2cap_get_auth_type(chan);
 
@@ -1214,7 +1214,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan)
 	err = 0;
 
 done:
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 	hci_dev_put(hdev);
 	return err;
 }

net/bluetooth/sco.c

@@ -189,7 +189,7 @@ static int sco_connect(struct sock *sk)
 	if (!hdev)
 		return -EHOSTUNREACH;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 
 	if (lmp_esco_capable(hdev) && !disable_esco)
 		type = ESCO_LINK;
@@ -225,7 +225,7 @@ static int sco_connect(struct sock *sk)
 	}
 
 done:
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 	hci_dev_put(hdev);
 	return err;
 }