When connecting to remote device that uses RPA, first we start scan,
to find current address of this device. Inside hci_connect_le_scan
hci_conn_add is called. If we find device with matching RPA, and start
connecting, hci_conn that was returned from this call is reused, and
destroyed at end of connection by calling hci_conn_del. If we don't
find device with matching RPA, and scan timeouts, or is canceled, we
also have to call hci_conn_del, which is not happening right now. That
is leaving module refcount in bad state.
This patch adds hci_conn_del_from_disc_work method, that is same as
hci_conn_del, except that it doesn't cancel disc_work (because it's
called from it, and that would cause stalled worker). It also adds call
to this new method from hci_connect_le_scan_remove.
Signed-off-by: Jakub Pawlowski <jpawlowski@xxxxxxxxxx>
---
net/bluetooth/hci_conn.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 2ebcaaa..d8a995a 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -35,6 +35,8 @@
#include "smp.h"
#include "a2mp.h"
+static int hci_conn_del_from_disc_work(struct hci_conn *conn);
+
struct sco_param {
u16 pkt_type;
u16 max_latency;
@@ -104,7 +106,10 @@ static void hci_connect_le_scan_remove(struct hci_conn *conn)
{
hci_connect_le_scan_cleanup(conn);
- hci_conn_hash_del(conn->hdev, conn);
+ /* hci_connect_le_scan_remove is only called from disc_work. Make sure
+ * we don't try to cancel synchronously this work when deleting conn.
+ */
+ hci_conn_del_from_disc_work(conn);
}
static void hci_acl_create_connection(struct hci_conn *conn)
@@ -550,13 +555,11 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
return conn;
}
-int hci_conn_del(struct hci_conn *conn)
+static int hci_conn_del_from_disc_work(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
-
- cancel_delayed_work_sync(&conn->disc_work);
cancel_delayed_work_sync(&conn->auto_accept_work);
cancel_delayed_work_sync(&conn->idle_work);
@@ -607,6 +610,16 @@ int hci_conn_del(struct hci_conn *conn)
return 0;
}
+int hci_conn_del(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
+
+ cancel_delayed_work_sync(&conn->disc_work);
+ return hci_conn_del_from_disc_work(conn);
+}
+
struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
{
int use_src = bacmp(src, BDADDR_ANY);
--
2.5.0
--
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