* Any other suggestions?
*/
-static DEFINE_IDR(iio_trigger_idr);
-static DEFINE_SPINLOCK(iio_trigger_idr_lock);
+static DEFINE_IDA(iio_trigger_ida);
/* Single list of all available triggers */
static LIST_HEAD(iio_trigger_list);
NULL);
}
-
-/**
- * iio_trigger_register_id() - get a unique id for this trigger
- * @trig_info: the trigger
- **/
-static int iio_trigger_register_id(struct iio_trigger *trig_info)
-{
- int ret = 0;
-
-idr_again:
- if (unlikely(idr_pre_get(&iio_trigger_idr, GFP_KERNEL) == 0))
- return -ENOMEM;
-
- spin_lock(&iio_trigger_idr_lock);
- ret = idr_get_new(&iio_trigger_idr, NULL, &trig_info->id);
- spin_unlock(&iio_trigger_idr_lock);
- if (unlikely(ret == -EAGAIN))
- goto idr_again;
- else if (likely(!ret))
- trig_info->id = trig_info->id & MAX_ID_MASK;
-
- return ret;
-}
-
-/**
- * iio_trigger_unregister_id() - free up unique id for use by another trigger
- * @trig_info: the trigger
- **/
-static void iio_trigger_unregister_id(struct iio_trigger *trig_info)
-{
- spin_lock(&iio_trigger_idr_lock);
- idr_remove(&iio_trigger_idr, trig_info->id);
- spin_unlock(&iio_trigger_idr_lock);
-}
-
int iio_trigger_register(struct iio_trigger *trig_info)
{
int ret;
- ret = iio_trigger_register_id(trig_info);
- if (ret)
+ trig_info->id = ida_simple_get(&iio_trigger_ida, 0, 0, GFP_KERNEL);
+ if (trig_info->id < 0) {
+ ret = trig_info->id;
goto error_ret;
+ }
/* Set the name used for the sysfs directory etc */
dev_set_name(&trig_info->dev, "trigger%ld",
(unsigned long) trig_info->id);
error_device_del:
device_del(&trig_info->dev);
error_unregister_id:
- iio_trigger_unregister_id(trig_info);
+ ida_simple_remove(&iio_trigger_ida, trig_info->id);
error_ret:
return ret;
}
mutex_unlock(&iio_trigger_list_lock);
iio_trigger_unregister_sysfs(trig_info);
- iio_trigger_unregister_id(trig_info);
+ ida_simple_remove(&iio_trigger_ida, trig_info->id);
/* Possible issue in here */
device_unregister(&trig_info->dev);
}