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| author | Libor Pechacek <lpechacek@suse.cz> | 2014-04-29 20:38:34 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-05-05 19:25:06 -0700 |
| commit | 86aae6c7b577654b7293374973985a153e0c147e (patch) | |
| tree | 2bc969c42c78d2fa817c0bdb0d0a85dcf692d075 /net/bluetooth/rfcomm | |
| parent | 22e70786413ed05950207eda7be420c280b776d7 (diff) | |
| download | linux-86aae6c7b577654b7293374973985a153e0c147e.tar.bz2 | |
Bluetooth: Convert RFCOMM spinlocks into mutexes
Enabling CONFIG_DEBUG_ATOMIC_SLEEP has shown that some rfcomm functions
acquiring spinlocks call sleeping locks further in the chain. Converting
the offending spinlocks into mutexes makes sleeping safe.
Signed-off-by: Libor Pechacek <lpechacek@suse.cz>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/rfcomm')
| -rw-r--r-- | net/bluetooth/rfcomm/core.c | 2 | ||||
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 20 |
2 files changed, 11 insertions, 11 deletions
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c index 633cceeb943e..05c609b12a1d 100644 --- a/net/bluetooth/rfcomm/core.c +++ b/net/bluetooth/rfcomm/core.c @@ -307,7 +307,7 @@ struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio) setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d); skb_queue_head_init(&d->tx_queue); - spin_lock_init(&d->lock); + mutex_init(&d->lock); atomic_set(&d->refcnt, 1); rfcomm_dlc_clear_state(d); diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 403ec09f480a..8e385a0ae60e 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -70,7 +70,7 @@ struct rfcomm_dev { }; static LIST_HEAD(rfcomm_dev_list); -static DEFINE_SPINLOCK(rfcomm_dev_lock); +static DEFINE_MUTEX(rfcomm_dev_lock); static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb); static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err); @@ -96,9 +96,9 @@ static void rfcomm_dev_destruct(struct tty_port *port) if (dev->tty_dev) tty_unregister_device(rfcomm_tty_driver, dev->id); - spin_lock(&rfcomm_dev_lock); + mutex_lock(&rfcomm_dev_lock); list_del(&dev->list); - spin_unlock(&rfcomm_dev_lock); + mutex_unlock(&rfcomm_dev_lock); kfree(dev); @@ -161,14 +161,14 @@ static struct rfcomm_dev *rfcomm_dev_get(int id) { struct rfcomm_dev *dev; - spin_lock(&rfcomm_dev_lock); + mutex_lock(&rfcomm_dev_lock); dev = __rfcomm_dev_lookup(id); if (dev && !tty_port_get(&dev->port)) dev = NULL; - spin_unlock(&rfcomm_dev_lock); + mutex_unlock(&rfcomm_dev_lock); return dev; } @@ -224,7 +224,7 @@ static struct rfcomm_dev *__rfcomm_dev_add(struct rfcomm_dev_req *req, if (!dev) return ERR_PTR(-ENOMEM); - spin_lock(&rfcomm_dev_lock); + mutex_lock(&rfcomm_dev_lock); if (req->dev_id < 0) { dev->id = 0; @@ -305,11 +305,11 @@ static struct rfcomm_dev *__rfcomm_dev_add(struct rfcomm_dev_req *req, holds reference to this module. */ __module_get(THIS_MODULE); - spin_unlock(&rfcomm_dev_lock); + mutex_unlock(&rfcomm_dev_lock); return dev; out: - spin_unlock(&rfcomm_dev_lock); + mutex_unlock(&rfcomm_dev_lock); kfree(dev); return ERR_PTR(err); } @@ -524,7 +524,7 @@ static int rfcomm_get_dev_list(void __user *arg) di = dl->dev_info; - spin_lock(&rfcomm_dev_lock); + mutex_lock(&rfcomm_dev_lock); list_for_each_entry(dev, &rfcomm_dev_list, list) { if (!tty_port_get(&dev->port)) @@ -540,7 +540,7 @@ static int rfcomm_get_dev_list(void __user *arg) break; } - spin_unlock(&rfcomm_dev_lock); + mutex_unlock(&rfcomm_dev_lock); dl->dev_num = n; size = sizeof(*dl) + n * sizeof(*di); |