/* wait for irq handler to change our state */
static int wait_for_state(struct hvsi_struct *hp, int state)
{
- unsigned long end_jiffies = jiffies + HVSI_TIMEOUT;
- unsigned long timeout;
int ret = 0;
- DECLARE_WAITQUEUE(myself, current);
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&hp->stateq, &myself);
-
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (hp->state == state)
- break;
- timeout = end_jiffies - jiffies;
- if (time_after(jiffies, end_jiffies)) {
- ret = -EIO;
- break;
- }
- schedule_timeout(timeout);
- }
- remove_wait_queue(&hp->stateq, &myself);
- set_current_state(TASK_RUNNING);
+ if (!wait_event_timeout(hp->stateq, (hp->state == state), HVSI_TIMEOUT))
+ ret = -EIO;
return ret;
}
/* wait for hvsi_write_worker to empty hp->outbuf */
static void hvsi_flush_output(struct hvsi_struct *hp)
{
- unsigned long end_jiffies = jiffies + HVSI_TIMEOUT;
- unsigned long timeout;
-
- DECLARE_WAITQUEUE(myself, current);
- set_current_state(TASK_UNINTERRUPTIBLE);
- add_wait_queue(&hp->emptyq, &myself);
-
- for (;;) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- if (hp->n_outbuf <= 0)
- break;
- timeout = end_jiffies - jiffies;
- if (time_after(jiffies, end_jiffies))
- break;
- schedule_timeout(timeout);
- }
- remove_wait_queue(&hp->emptyq, &myself);
- set_current_state(TASK_RUNNING);
+ wait_event_timeout(hp->emptyq, (hp->n_outbuf <= 0), HVSI_TIMEOUT);
/* 'writer' could still be pending if it didn't see n_outbuf = 0 yet */
cancel_delayed_work(&hp->writer);