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| author | Gustavo F. Padovan <padovan@profusion.mobi> | 2011-12-27 15:28:45 -0200 |
|---|---|---|
| committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2012-01-02 22:19:29 -0200 |
| commit | 393432cd8dc02b88a00decd495913643aa5ff705 (patch) | |
| tree | 2c59666496a3c669781bbc8bb5f94854a1b6f944 /net/bluetooth | |
| parent | 95ca83f42fb5f5bf789b514635f79242afe555d1 (diff) | |
| download | lwn-393432cd8dc02b88a00decd495913643aa5ff705.tar.gz lwn-393432cd8dc02b88a00decd495913643aa5ff705.zip | |
Bluetooth: Fix context in RFCOMM tty
We now run in process context, no need to disable interrupts.
Calls from the tty layer also run in process context.
rw_lock was converted to spinlock, we have more writers than readers in
this case.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index fa8f4de53b99..a2d4f5122a6a 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -76,7 +76,7 @@ struct rfcomm_dev { }; static LIST_HEAD(rfcomm_dev_list); -static DEFINE_RWLOCK(rfcomm_dev_lock); +static DEFINE_SPINLOCK(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); @@ -146,7 +146,7 @@ static inline struct rfcomm_dev *rfcomm_dev_get(int id) { struct rfcomm_dev *dev; - read_lock(&rfcomm_dev_lock); + spin_lock(&rfcomm_dev_lock); dev = __rfcomm_dev_get(id); @@ -157,7 +157,7 @@ static inline struct rfcomm_dev *rfcomm_dev_get(int id) rfcomm_dev_hold(dev); } - read_unlock(&rfcomm_dev_lock); + spin_unlock(&rfcomm_dev_lock); return dev; } @@ -205,7 +205,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) if (!dev) return -ENOMEM; - write_lock_bh(&rfcomm_dev_lock); + spin_lock(&rfcomm_dev_lock); if (req->dev_id < 0) { dev->id = 0; @@ -290,7 +290,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) __module_get(THIS_MODULE); out: - write_unlock_bh(&rfcomm_dev_lock); + spin_unlock(&rfcomm_dev_lock); if (err < 0) goto free; @@ -327,9 +327,9 @@ static void rfcomm_dev_del(struct rfcomm_dev *dev) if (atomic_read(&dev->opened) > 0) return; - write_lock_bh(&rfcomm_dev_lock); + spin_lock(&rfcomm_dev_lock); list_del_init(&dev->list); - write_unlock_bh(&rfcomm_dev_lock); + spin_unlock(&rfcomm_dev_lock); rfcomm_dev_put(dev); } @@ -473,7 +473,7 @@ static int rfcomm_get_dev_list(void __user *arg) di = dl->dev_info; - read_lock_bh(&rfcomm_dev_lock); + spin_lock(&rfcomm_dev_lock); list_for_each_entry(dev, &rfcomm_dev_list, list) { if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) @@ -488,7 +488,7 @@ static int rfcomm_get_dev_list(void __user *arg) break; } - read_unlock_bh(&rfcomm_dev_lock); + spin_unlock(&rfcomm_dev_lock); dl->dev_num = n; size = sizeof(*dl) + n * sizeof(*di); @@ -766,9 +766,9 @@ static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp) rfcomm_dlc_unlock(dev->dlc); if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) { - write_lock_bh(&rfcomm_dev_lock); + spin_lock(&rfcomm_dev_lock); list_del_init(&dev->list); - write_unlock_bh(&rfcomm_dev_lock); + spin_unlock(&rfcomm_dev_lock); rfcomm_dev_put(dev); } |