diff options
| -rw-r--r-- | include/net/bluetooth/rfcomm.h | 1 | ||||
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 30 |
2 files changed, 23 insertions, 8 deletions
diff --git a/include/net/bluetooth/rfcomm.h b/include/net/bluetooth/rfcomm.h index 3c563f02907..25aa575db80 100644 --- a/include/net/bluetooth/rfcomm.h +++ b/include/net/bluetooth/rfcomm.h @@ -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; diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index ba469b038ea..23ba61a13bd 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -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 @@ out: 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; |