if (err)
return -EFAULT;
- ev = pps->last_ev;
-
- /* Manage the timeout */
- if (fdata.timeout.flags & PPS_TIME_INVALID)
- err = wait_event_interruptible(pps->queue,
- ev != pps->last_ev);
- else {
- unsigned long ticks;
-
- dev_dbg(pps->dev, "timeout %lld.%09d\n",
- (long long) fdata.timeout.sec,
- fdata.timeout.nsec);
- ticks = fdata.timeout.sec * HZ;
- ticks += fdata.timeout.nsec / (NSEC_PER_SEC / HZ);
-
- if (ticks != 0) {
- err = wait_event_interruptible_timeout(
- pps->queue,
- ev != pps->last_ev,
- ticks);
- if (err == 0)
- return -ETIMEDOUT;
+ if (!(file->f_flags & O_NONBLOCK)) {
+ ev = pps->last_ev;
+
+ /* Manage the timeout */
+ if (fdata.timeout.flags & PPS_TIME_INVALID)
+ err = wait_event_interruptible(pps->queue,
+ ev != pps->last_ev);
+ else {
+ unsigned long ticks;
+
+ dev_dbg(pps->dev, "timeout %lld.%09d\n",
+ (long long) fdata.timeout.sec,
+ fdata.timeout.nsec);
+ ticks = fdata.timeout.sec * HZ;
+ ticks += fdata.timeout.nsec /
+ (NSEC_PER_SEC / HZ);
+
+ if (ticks != 0) {
+ err = wait_event_interruptible_timeout(
+ pps->queue,
+ ev != pps->last_ev,
+ ticks);
+ if (err == 0)
+ return -ETIMEDOUT;
+ }
}
- }
- /* Check for pending signals */
- if (err == -ERESTARTSYS) {
- dev_dbg(pps->dev, "pending signal caught\n");
- return -EINTR;
+ /* Check for pending signals */
+ if (err == -ERESTARTSYS) {
+ dev_dbg(pps->dev, "pending signal caught\n");
+ return -EINTR;
+ }
}
/* Return the fetched timestamp */