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Bluetooth: Check rules when setting retransmit or monitor timers 

The ERTM specification requires the retransmit timer to be cancelled
when the monitor timer is set.  The retransmit timer cannot be set
again while the monitor timer is pending.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Mat Martineau 2012-05-17 20:53:49 -07:00 committed by Johan Hedberg
parent c9e3d5e004
commit 4239d16f36
2 changed files with 20 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/bluetooth/l2cap.h
View File

@ -706,11 +706,7 @@ static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));

22
net/bluetooth/l2cap_core.c
View File

@ -227,6 +227,24 @@ static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err)
release_sock(sk);
}
static void __set_retrans_timer(struct l2cap_chan *chan)
{
if (!delayed_work_pending(&chan->monitor_timer) &&
chan->retrans_timeout) {
l2cap_set_timer(chan, &chan->retrans_timer,
msecs_to_jiffies(chan->retrans_timeout));
}
}
static void __set_monitor_timer(struct l2cap_chan *chan)
{
__clear_retrans_timer(chan);
if (chan->monitor_timeout) {
l2cap_set_timer(chan, &chan->monitor_timer,
msecs_to_jiffies(chan->monitor_timeout));
}
}
static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head,
u16 seq)
{
@ -1619,7 +1637,7 @@ int __l2cap_wait_ack(struct sock *sk)
static void l2cap_monitor_timeout(struct work_struct *work)
{
struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
monitor_timer.work);
monitor_timer.work);
BT_DBG("chan %p", chan);
@ -1643,7 +1661,7 @@ static void l2cap_monitor_timeout(struct work_struct *work)
static void l2cap_retrans_timeout(struct work_struct *work)
{
struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
retrans_timer.work);
retrans_timer.work);
BT_DBG("chan %p", chan);