@@ -109,6 +109,7 @@ static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
static DEFINE_SPINLOCK(hardware_lock);
static DEFINE_SPINLOCK(dev_lock);
+static bool device_open;
static int rx_buf[RBUF_LEN];
unsigned int rx_tail, rx_head;
@@ -147,10 +148,11 @@ static void drop_port(void);
static int lirc_open(struct inode *inode, struct file *file)
{
spin_lock(&dev_lock);
- if (module_refcount(THIS_MODULE)) {
+ if (device_open) {
spin_unlock(&dev_lock);
return -EBUSY;
}
+ device_open = true;
spin_unlock(&dev_lock);
return 0;
}
@@ -158,6 +160,9 @@ static int lirc_open(struct inode *inode, struct file *file)
static int lirc_close(struct inode *inode, struct file *file)
{
+ spin_lock(&dev_lock);
+ device_open = false;
+ spin_unlock(&dev_lock);
return 0;
}
@@ -363,7 +368,6 @@ static struct lirc_driver driver = {
};
-#ifdef MODULE
static int init_chrdev(void)
{
driver.minor = lirc_register_driver(&driver);
@@ -380,7 +384,6 @@ static void drop_chrdev(void)
{
lirc_unregister_driver(driver.minor);
}
-#endif
/* SECTION: Hardware */
@@ -240,7 +240,7 @@ static void irq_handler(void *blah)
unsigned int level, newlevel;
unsigned int timeout;
- if (!module_refcount(THIS_MODULE))
+ if (!is_open)
return;
if (!is_claimed)
@@ -515,7 +515,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
static int lirc_open(struct inode *node, struct file *filep)
{
- if (module_refcount(THIS_MODULE) || !lirc_claim())
+ if (is_open || !lirc_claim())
return -EBUSY;
parport_enable_irq(pport);