* [PATCH] Bluetooth: Check for chan_type before locking sk
@ 2012-01-20 14:35 Emeltchenko Andrei
2012-01-21 16:40 ` Marcel Holtmann
0 siblings, 1 reply; 2+ messages in thread
From: Emeltchenko Andrei @ 2012-01-20 14:35 UTC (permalink / raw)
To: linux-bluetooth
From: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Removes un-needed locking/unlocking if chan_type is not
L2CAP_CHAN_CONN_ORIENTED and also protects from locking
zero sk.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
---
net/bluetooth/l2cap_core.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index b303eae..916ddb1 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -770,13 +770,12 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
list_for_each_entry_rcu(chan, &conn->chan_l, list) {
struct sock *sk = chan->sk;
- bh_lock_sock(sk);
-
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
- bh_unlock_sock(sk);
continue;
}
+ bh_lock_sock(sk);
+
if (chan->state == BT_CONNECT) {
struct l2cap_conn_req req;
--
1.7.4.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] Bluetooth: Check for chan_type before locking sk
2012-01-20 14:35 [PATCH] Bluetooth: Check for chan_type before locking sk Emeltchenko Andrei
@ 2012-01-21 16:40 ` Marcel Holtmann
0 siblings, 0 replies; 2+ messages in thread
From: Marcel Holtmann @ 2012-01-21 16:40 UTC (permalink / raw)
To: Emeltchenko Andrei; +Cc: linux-bluetooth
Hi Andrei,
> Removes un-needed locking/unlocking if chan_type is not
> L2CAP_CHAN_CONN_ORIENTED and also protects from locking
> zero sk.
>
> Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
> ---
> net/bluetooth/l2cap_core.c | 5 ++---
> 1 files changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
> index b303eae..916ddb1 100644
> --- a/net/bluetooth/l2cap_core.c
> +++ b/net/bluetooth/l2cap_core.c
> @@ -770,13 +770,12 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
> list_for_each_entry_rcu(chan, &conn->chan_l, list) {
> struct sock *sk = chan->sk;
>
> - bh_lock_sock(sk);
> -
> if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
> - bh_unlock_sock(sk);
> continue;
> }
this actually raises the question how l2cap_chan is protected. Seems
like we are using the socket lock to protect it. Maybe that needs to be
untangled first.
Regards
Marcel
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-01-20 14:35 [PATCH] Bluetooth: Check for chan_type before locking sk Emeltchenko Andrei
2012-01-21 16:40 ` Marcel Holtmann
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