From a514b17fab51c1433db920d76cf8ddda959e5da0 Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Date: Wed, 14 Nov 2012 17:39:30 +0200
Subject: [PATCH] Bluetooth: Refactor locking in amp_physical_cfm
Remove locking from l2cap_physical_cfm and lock chan inside
amp_physical_cfm.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
include/net/bluetooth/l2cap.h | 2 +-
net/bluetooth/amp.c | 6 +++++-
net/bluetooth/l2cap_core.c | 7 ++-----
3 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index d65db459c8436..f57fab04e7c5f 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -811,6 +811,6 @@ void l2cap_send_conn_req(struct l2cap_chan *chan);
void l2cap_move_start(struct l2cap_chan *chan);
void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
u8 status);
-void l2cap_physical_cfm(struct l2cap_chan *chan, int result);
+void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
#endif /* __L2CAP_H */
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 4b2fea6c1c2a6..eaf473ffeef9e 100644
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -386,13 +386,17 @@ void amp_physical_cfm(struct hci_conn *bredr_hcon, struct hci_conn *hs_hcon)
bredr_chan = mgr->bredr_chan;
+ l2cap_chan_lock(bredr_chan);
+
set_bit(FLAG_EFS_ENABLE, &bredr_chan->flags);
bredr_chan->remote_amp_id = hs_hcon->remote_id;
bredr_chan->hs_hcon = hs_hcon;
bredr_chan->conn->mtu = hs_hcon->hdev->block_mtu;
bredr_chan->fcs = L2CAP_FCS_NONE;
- l2cap_physical_cfm(bredr_chan, 0);
+ __l2cap_physical_cfm(bredr_chan, 0);
+
+ l2cap_chan_unlock(bredr_chan);
hci_dev_put(bredr_hdev);
}
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index e4f52a7f08c6b..22c4ef926b0d6 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4611,7 +4611,8 @@ static void l2cap_do_move_cancel(struct l2cap_chan *chan, int result)
l2cap_ertm_send(chan);
}
-void l2cap_physical_cfm(struct l2cap_chan *chan, int result)
+/* Invoke with locked chan */
+void __l2cap_physical_cfm(struct l2cap_chan *chan, int result)
{
u8 local_amp_id = chan->local_amp_id;
u8 remote_amp_id = chan->remote_amp_id;
@@ -4619,8 +4620,6 @@ void l2cap_physical_cfm(struct l2cap_chan *chan, int result)
BT_DBG("chan %p, result %d, local_amp_id %d, remote_amp_id %d",
chan, result, local_amp_id, remote_amp_id);
- l2cap_chan_lock(chan);
-
if (chan->state == BT_DISCONN || chan->state == BT_CLOSED) {
l2cap_chan_unlock(chan);
return;
@@ -4644,8 +4643,6 @@ void l2cap_physical_cfm(struct l2cap_chan *chan, int result)
break;
}
}
-
- l2cap_chan_unlock(chan);
}
static inline int l2cap_move_channel_req(struct l2cap_conn *conn,