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Bluetooth: Use wait_event_interruptible for virtual driver 

The virtual driver still uses a home grown way of waiting for events and
so just replace it with wait_event_interruptible. And while at it remove
the useless access_ok() checks.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann 2009-06-08 14:13:57 +02:00
parent ac28494c51
commit 4db7589f3d
1 changed files with 15 additions and 28 deletions
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43
drivers/bluetooth/hci_vhci.c
View File

@ -179,41 +179,31 @@ static inline ssize_t vhci_put_user(struct vhci_data *data,
static ssize_t vhci_read(struct file *file,
char __user *buf, size_t count, loff_t *pos)
{
DECLARE_WAITQUEUE(wait, current);
struct vhci_data *data = file->private_data;
struct sk_buff *skb;
ssize_t ret = 0;
add_wait_queue(&data->read_wait, &wait);
while (count) {
set_current_state(TASK_INTERRUPTIBLE);
skb = skb_dequeue(&data->readq);
if (!skb) {
if (file->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
break;
}
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
schedule();
continue;
if (skb) {
ret = vhci_put_user(data, skb, buf, count);
if (ret < 0)
skb_queue_head(&data->readq, skb);
else
kfree_skb(skb);
break;
}
if (access_ok(VERIFY_WRITE, buf, count))
ret = vhci_put_user(data, skb, buf, count);
else
ret = -EFAULT;
if (file->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
break;
}
kfree_skb(skb);
break;
ret = wait_event_interruptible(data->read_wait,
!skb_queue_empty(&data->readq));
if (ret < 0)
break;
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&data->read_wait, &wait);
return ret;
}
@ -223,9 +213,6 @@ static ssize_t vhci_write(struct file *file,
{
struct vhci_data *data = file->private_data;
if (!access_ok(VERIFY_READ, buf, count))
return -EFAULT;
return vhci_get_user(data, buf, count);
}