diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-02-10 02:59:19 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-02-14 22:39:31 +0100 |
| commit | f355095756c2a0b77a5b0aa0384c0c09d9735252 (patch) | |
| tree | 0398680c23156f609f1a95d10430b37c2b193fe0 /net/bluetooth/rfcomm/tty.c | |
| parent | Bluetooth: Serialize RFCOMMCREATEDEV and RFCOMMRELEASEDEV ioctls (diff) | |
| download | linux-f355095756c2a0b77a5b0aa0384c0c09d9735252.tar.xz linux-f355095756c2a0b77a5b0aa0384c0c09d9735252.zip | |
Bluetooth: Refactor rfcomm_dev_add()
Move rfcomm_dev allocation and initialization into new function,
__rfcomm_dev_add(), to simplify resource release in error handling.
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/rfcomm/tty.c')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index ef2769553dab..0537a0501595 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -208,17 +208,16 @@ static ssize_t show_channel(struct device *tty_dev, struct device_attribute *att static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); static DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL); -static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) +static struct rfcomm_dev *__rfcomm_dev_add(struct rfcomm_dev_req *req, + struct rfcomm_dlc *dlc) { struct rfcomm_dev *dev, *entry; struct list_head *head = &rfcomm_dev_list; int err = 0; - BT_DBG("id %d channel %d", req->dev_id, req->channel); - dev = kzalloc(sizeof(struct rfcomm_dev), GFP_KERNEL); if (!dev) - return -ENOMEM; + return ERR_PTR(-ENOMEM); spin_lock(&rfcomm_dev_lock); @@ -301,22 +300,37 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) holds reference to this module. */ __module_get(THIS_MODULE); + spin_unlock(&rfcomm_dev_lock); + return dev; + out: spin_unlock(&rfcomm_dev_lock); + kfree(dev); + return ERR_PTR(err); +} - if (err < 0) - goto free; +static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) +{ + struct rfcomm_dev *dev; + struct device *tty; + + BT_DBG("id %d channel %d", req->dev_id, req->channel); - dev->tty_dev = tty_port_register_device(&dev->port, rfcomm_tty_driver, + dev = __rfcomm_dev_add(req, dlc); + if (IS_ERR(dev)) + return PTR_ERR(dev); + + tty = tty_port_register_device(&dev->port, rfcomm_tty_driver, dev->id, NULL); - if (IS_ERR(dev->tty_dev)) { - err = PTR_ERR(dev->tty_dev); + if (IS_ERR(tty)) { spin_lock(&rfcomm_dev_lock); list_del(&dev->list); spin_unlock(&rfcomm_dev_lock); - goto free; + kfree(dev); + return PTR_ERR(tty); } + dev->tty_dev = tty; rfcomm_reparent_device(dev); dev_set_drvdata(dev->tty_dev, dev); @@ -327,10 +341,6 @@ out: BT_ERR("Failed to create channel attribute"); return dev->id; - -free: - kfree(dev); - return err; } /* ---- Send buffer ---- */ |