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path: root/drivers/bluetooth/hci_vhci.c
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Diffstat (limited to 'drivers/bluetooth/hci_vhci.c')
-rw-r--r--drivers/bluetooth/hci_vhci.c90
1 files changed, 19 insertions, 71 deletions
diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
index 0bbefba6469c..1df9dda2e377 100644
--- a/drivers/bluetooth/hci_vhci.c
+++ b/drivers/bluetooth/hci_vhci.c
@@ -40,7 +40,7 @@
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
-#define VERSION "1.2"
+#define VERSION "1.3"
static int minor = MISC_DYNAMIC_MINOR;
@@ -51,14 +51,8 @@ struct vhci_data {
wait_queue_head_t read_wait;
struct sk_buff_head readq;
-
- struct fasync_struct *fasync;
};
-#define VHCI_FASYNC 0x0010
-
-static struct miscdevice vhci_miscdev;
-
static int vhci_open_dev(struct hci_dev *hdev)
{
set_bit(HCI_RUNNING, &hdev->flags);
@@ -105,9 +99,6 @@ static int vhci_send_frame(struct sk_buff *skb)
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
skb_queue_tail(&data->readq, skb);
- if (data->flags & VHCI_FASYNC)
- kill_fasync(&data->fasync, SIGIO, POLL_IN);
-
wake_up_interruptible(&data->read_wait);
return 0;
@@ -179,41 +170,31 @@ 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 +204,6 @@ 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);
}
@@ -259,11 +237,9 @@ static int vhci_open(struct inode *inode, struct file *file)
skb_queue_head_init(&data->readq);
init_waitqueue_head(&data->read_wait);
- lock_kernel();
hdev = hci_alloc_dev();
if (!hdev) {
kfree(data);
- unlock_kernel();
return -ENOMEM;
}
@@ -284,12 +260,10 @@ static int vhci_open(struct inode *inode, struct file *file)
BT_ERR("Can't register HCI device");
kfree(data);
hci_free_dev(hdev);
- unlock_kernel();
return -EBUSY;
}
file->private_data = data;
- unlock_kernel();
return nonseekable_open(inode, file);
}
@@ -310,48 +284,25 @@ static int vhci_release(struct inode *inode, struct file *file)
return 0;
}
-static int vhci_fasync(int fd, struct file *file, int on)
-{
- struct vhci_data *data = file->private_data;
- int err = 0;
-
- lock_kernel();
- err = fasync_helper(fd, file, on, &data->fasync);
- if (err < 0)
- goto out;
-
- if (on)
- data->flags |= VHCI_FASYNC;
- else
- data->flags &= ~VHCI_FASYNC;
-
-out:
- unlock_kernel();
- return err;
-}
-
static const struct file_operations vhci_fops = {
- .owner = THIS_MODULE,
.read = vhci_read,
.write = vhci_write,
.poll = vhci_poll,
.ioctl = vhci_ioctl,
.open = vhci_open,
.release = vhci_release,
- .fasync = vhci_fasync,
};
static struct miscdevice vhci_miscdev= {
- .name = "vhci",
- .fops = &vhci_fops,
+ .name = "vhci",
+ .fops = &vhci_fops,
+ .minor = MISC_DYNAMIC_MINOR,
};
static int __init vhci_init(void)
{
BT_INFO("Virtual HCI driver ver %s", VERSION);
- vhci_miscdev.minor = minor;
-
if (misc_register(&vhci_miscdev) < 0) {
BT_ERR("Can't register misc device with minor %d", minor);
return -EIO;
@@ -369,9 +320,6 @@ static void __exit vhci_exit(void)
module_init(vhci_init);
module_exit(vhci_exit);
-module_param(minor, int, 0444);
-MODULE_PARM_DESC(minor, "Miscellaneous minor device number");
-
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION);
MODULE_VERSION(VERSION);