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-rw-r--r--drivers/base/power/wakeup.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 1132799..cf1706d 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -660,29 +660,33 @@ bool pm_wakeup_pending(void)
/**
* pm_get_wakeup_count - Read the number of registered wakeup events.
* @count: Address to store the value at.
+ * @block: Whether or not to block.
*
- * Store the number of registered wakeup events at the address in @count. Block
- * if the current number of wakeup events being processed is nonzero.
+ * Store the number of registered wakeup events at the address in @count. If
+ * @block is set, block until the current number of wakeup events being
+ * processed is zero.
*
- * Return 'false' if the wait for the number of wakeup events being processed to
- * drop down to zero has been interrupted by a signal (and the current number
- * of wakeup events being processed is still nonzero). Otherwise return 'true'.
+ * Return 'false' if the current number of wakeup events being processed is
+ * nonzero. Otherwise return 'true'.
*/
-bool pm_get_wakeup_count(unsigned int *count)
+bool pm_get_wakeup_count(unsigned int *count, bool block)
{
unsigned int cnt, inpr;
- DEFINE_WAIT(wait);
- for (;;) {
- prepare_to_wait(&wakeup_count_wait_queue, &wait,
- TASK_INTERRUPTIBLE);
- split_counters(&cnt, &inpr);
- if (inpr == 0 || signal_pending(current))
- break;
+ if (block) {
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait(&wakeup_count_wait_queue, &wait,
+ TASK_INTERRUPTIBLE);
+ split_counters(&cnt, &inpr);
+ if (inpr == 0 || signal_pending(current))
+ break;
- schedule();
+ schedule();
+ }
+ finish_wait(&wakeup_count_wait_queue, &wait);
}
- finish_wait(&wakeup_count_wait_queue, &wait);
split_counters(&cnt, &inpr);
*count = cnt;
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