Return-Path: From: Emeltchenko Andrei To: linux-bluetooth@vger.kernel.org Subject: [RFCv5 04/16] Bluetooth: Do not use sk lock in get_chan functions Date: Fri, 17 Feb 2012 15:44:00 +0200 Message-Id: <1329486252-25252-5-git-send-email-Andrei.Emeltchenko.news@gmail.com> In-Reply-To: <1329486252-25252-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> References: <1329486252-25252-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: From: Andrei Emeltchenko Take explicit lock. This change is needed to get rid of socket locks in L2CAP core code. Socket locks will be changed by chan locks in the following patches. Signed-off-by: Andrei Emeltchenko --- net/bluetooth/l2cap_core.c | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 18a9742..90e29ac 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -105,9 +105,8 @@ static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 ci mutex_lock(&conn->chan_lock); c = __l2cap_get_chan_by_scid(conn, cid); - if (c) - lock_sock(c->sk); mutex_unlock(&conn->chan_lock); + return c; } @@ -128,9 +127,8 @@ static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn mutex_lock(&conn->chan_lock); c = __l2cap_get_chan_by_ident(conn, ident); - if (c) - lock_sock(c->sk); mutex_unlock(&conn->chan_lock); + return c; } @@ -2743,6 +2741,7 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd err = 0; sk = chan->sk; + lock_sock(sk); switch (result) { case L2CAP_CR_SUCCESS: @@ -2805,6 +2804,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr return -ENOENT; sk = chan->sk; + lock_sock(sk); if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { struct l2cap_cmd_rej_cid rej; @@ -2917,6 +2917,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr return 0; sk = chan->sk; + lock_sock(sk); switch (result) { case L2CAP_CONF_SUCCESS: @@ -3027,6 +3028,7 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd } sk = chan->sk; + lock_sock(sk); rsp.dcid = cpu_to_le16(chan->scid); rsp.scid = cpu_to_le16(chan->dcid); @@ -3065,6 +3067,7 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd } sk = chan->sk; + lock_sock(sk); l2cap_chan_del(chan, 0); release_sock(sk); @@ -4231,6 +4234,7 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk } sk = chan->sk; + lock_sock(sk); BT_DBG("chan %p, len %d", chan, skb->len); @@ -4661,6 +4665,7 @@ int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) if (chan && chan->sk) { struct sock *sk = chan->sk; + lock_sock(sk); if (chan->imtu < len - L2CAP_HDR_SIZE) { BT_ERR("Frame exceeding recv MTU (len %d, " -- 1.7.9