diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-02-10 02:59:20 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-02-14 22:39:32 +0100 |
| commit | fb856e50900a84dd9f8d50d3882eb4a26ba6ea54 (patch) | |
| tree | b04ea2e97ced0ca36862e776b779679e5546c9b3 /net/bluetooth | |
| parent | Bluetooth: Refactor rfcomm_dev_add() (diff) | |
| download | linux-fb856e50900a84dd9f8d50d3882eb4a26ba6ea54.tar.xz linux-fb856e50900a84dd9f8d50d3882eb4a26ba6ea54.zip | |
Bluetooth: Cleanup RFCOMM device registration error handling
If RFCOMM tty device registration fails, cleanup by releasing
the tty_port reference to trigger rfcomm_dev destruction
(rather than open-coding it).
The dlc reference release is moved into rfcomm_dev_add(),
which ensures cleanup in both error paths -- ie., if
__rfcomm_dev_add() fails or if tty_port_register_device() fails.
Fixes releasing the module reference if device registration fails.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Tested-By: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 0537a0501595..375b60dae04d 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -93,7 +93,8 @@ static void rfcomm_dev_destruct(struct tty_port *port) rfcomm_dlc_put(dlc); - tty_unregister_device(rfcomm_tty_driver, dev->id); + if (dev->tty_dev) + tty_unregister_device(rfcomm_tty_driver, dev->id); spin_lock(&rfcomm_dev_lock); list_del(&dev->list); @@ -317,16 +318,15 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) BT_DBG("id %d channel %d", req->dev_id, req->channel); dev = __rfcomm_dev_add(req, dlc); - if (IS_ERR(dev)) + if (IS_ERR(dev)) { + rfcomm_dlc_put(dlc); return PTR_ERR(dev); + } tty = tty_port_register_device(&dev->port, rfcomm_tty_driver, dev->id, NULL); if (IS_ERR(tty)) { - spin_lock(&rfcomm_dev_lock); - list_del(&dev->list); - spin_unlock(&rfcomm_dev_lock); - kfree(dev); + tty_port_put(&dev->port); return PTR_ERR(tty); } @@ -420,10 +420,8 @@ static int __rfcomm_create_dev(struct sock *sk, void __user *arg) } id = rfcomm_dev_add(&req, dlc); - if (id < 0) { - rfcomm_dlc_put(dlc); + if (id < 0) return id; - } if (req.flags & (1 << RFCOMM_REUSE_DLC)) { /* DLC is now used by device. |