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Bluetooth: Lock the L2CAP channel when sending

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The ERTM and streaming mode transmit queue must only be accessed while
the L2CAP channel lock is held.  Locking the channel before calling
l2cap_chan_send ensures that multiple threads cannot simultaneously
manipulate the queue when sending and receiving concurrently.

L2CAP channel locking had previously moved to the l2cap_chan struct
instead of the associated socket, so some of the old socket locking
can also be removed in this patch.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
This commit is contained in:
Mat Martineau
2012-05-04 14:20:31 -07:00
committed by Gustavo Padovan
parent ef191aded5
commit a6a5568c03
2 changed files with 6 additions and 8 deletions
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2
include/net/bluetooth/bluetooth.h
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@@ -257,12 +257,10 @@ static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
{
struct sk_buff *skb;
release_sock(sk);
if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
skb_reserve(skb, BT_SKB_RESERVE);
bt_cb(skb)->incoming = 0;
}
lock_sock(sk);
if (!skb && *err)
return NULL;