Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

[Bluetooth] Keep rfcomm_dev on the list until it is freed

Browse source 
This patch changes the RFCOMM TTY release process so that the TTY is kept
on the list until it is really freed. A new device flag is used to keep
track of released TTYs.

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Ville Tervo 2007-07-11 09:23:41 +02:00 committed by Marcel Holtmann
parent 84950cf0ba
commit 8de0a15483
2 changed files with 23 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
include/net/bluetooth/rfcomm.h
View file

@ -323,6 +323,7 @@ int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc
#define RFCOMM_RELEASE_ONHUP 1
#define RFCOMM_HANGUP_NOW 2
#define RFCOMM_TTY_ATTACHED 3
#define RFCOMM_TTY_RELEASED 4
struct rfcomm_dev_req {
s16 dev_id;

30
net/bluetooth/rfcomm/tty.c
View file

@ -95,6 +95,10 @@ static void rfcomm_dev_destruct(struct rfcomm_dev *dev)
BT_DBG("dev %p dlc %p", dev, dlc);
write_lock_bh(&rfcomm_dev_lock);
list_del_init(&dev->list);
write_unlock_bh(&rfcomm_dev_lock);
rfcomm_dlc_lock(dlc);
/* Detach DLC if it's owned by this dev */
if (dlc->owner == dev)
@ -156,8 +160,13 @@ static inline struct rfcomm_dev *rfcomm_dev_get(int id)
read_lock(&rfcomm_dev_lock);
dev = __rfcomm_dev_get(id);
if (dev)
rfcomm_dev_hold(dev);
if (dev) {
if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags))
dev = NULL;
else
rfcomm_dev_hold(dev);
}
read_unlock(&rfcomm_dev_lock);
@ -265,6 +274,12 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL);
if (IS_ERR(dev->tty_dev)) {
list_del(&dev->list);
kfree(dev);
return PTR_ERR(dev->tty_dev);
}
return dev->id;
}
@ -272,10 +287,7 @@ static void rfcomm_dev_del(struct rfcomm_dev *dev)
{
BT_DBG("dev %p", dev);
write_lock_bh(&rfcomm_dev_lock);
list_del_init(&dev->list);
write_unlock_bh(&rfcomm_dev_lock);
set_bit(RFCOMM_TTY_RELEASED, &dev->flags);
rfcomm_dev_put(dev);
}
@ -329,7 +341,7 @@ static int rfcomm_create_dev(struct sock *sk, void __user *arg)
if (copy_from_user(&req, arg, sizeof(req)))
return -EFAULT;
BT_DBG("sk %p dev_id %id flags 0x%x", sk, req.dev_id, req.flags);
BT_DBG("sk %p dev_id %d flags 0x%x", sk, req.dev_id, req.flags);
if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN))
return -EPERM;
@ -370,7 +382,7 @@ static int rfcomm_release_dev(void __user *arg)
if (copy_from_user(&req, arg, sizeof(req)))
return -EFAULT;
BT_DBG("dev_id %id flags 0x%x", req.dev_id, req.flags);
BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags);
if (!(dev = rfcomm_dev_get(req.dev_id)))
return -ENODEV;
@ -419,6 +431,8 @@ static int rfcomm_get_dev_list(void __user *arg)
list_for_each(p, &rfcomm_dev_list) {
struct rfcomm_dev *dev = list_entry(p, struct rfcomm_dev, list);
if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags))
continue;
(di + n)->id = dev->id;
(di + n)->flags = dev->flags;
(di + n)->state = dev->dlc->state;