diff options
Diffstat (limited to 'drivers/input/joystick/amijoy.c')
| -rw-r--r-- | drivers/input/joystick/amijoy.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/input/joystick/amijoy.c b/drivers/input/joystick/amijoy.c index cf36ca9..e996183 100644 --- a/drivers/input/joystick/amijoy.c +++ b/drivers/input/joystick/amijoy.c @@ -51,7 +51,8 @@ MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is __obsolete_setup("amijoy="); -static int amijoy_used[2] = { 0, 0 }; +static int amijoy_used; +static DECLARE_MUTEX(amijoy_sem); static struct input_dev amijoy_dev[2]; static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" }; @@ -84,26 +85,30 @@ static irqreturn_t amijoy_interrupt(int irq, void *dummy, struct pt_regs *fp) static int amijoy_open(struct input_dev *dev) { - int *used = dev->private; + int err; - if ((*used)++) - return 0; + err = down_interruptible(&amijoy_sem); + if (err) + return err; - if (request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { - (*used)--; + if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); - return -EBUSY; + err = -EBUSY; + goto out; } - return 0; + amijoy_used++; +out: + up(&amijoy_sem); + return err; } static void amijoy_close(struct input_dev *dev) { - int *used = dev->private; - - if (!--(*used)) + down(&amijoy_sem); + if (!--amijoy_used) free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); + up(&amijoy_sem); } static int __init amijoy_init(void) @@ -138,8 +143,6 @@ static int __init amijoy_init(void) amijoy_dev[i].id.product = 0x0003; amijoy_dev[i].id.version = 0x0100; - amijoy_dev[i].private = amijoy_used + i; - input_register_device(amijoy_dev + i); printk(KERN_INFO "input: %s at joy%ddat\n", amijoy_name, i); } |