From: "Gustavo F. Padovan" <padovan@xxxxxxxxxxxxxx>
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.
Signed-off-by: Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx>
---
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 fa8f4de5..a2d4f51 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);
}
--
1.7.7.5
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