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kernel: timer: Fix incorrect behavior for timers with K_FOREVER period 

Zephyr docs state that timers will act as one-shot timers when started
with a period of K_NO_WAIT or K_FOREVER. However the code adjusting
period was setting K_FOREVER timeout ticks to 1 which caused the timer
to expire every tick. This adds a check to not adjust K_FOREVER periods

Signed-off-by: Eric Johnson <eric@liveathos.com>
This commit is contained in:
Eric Johnson 2021-03-05 08:31:50 -06:00 committed by Anas Nashif
parent 98dbea0979
commit b4aeef4d5b
1 changed files with 2 additions and 1 deletions
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kernel/timer.c
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@ -126,7 +126,8 @@ void z_impl_k_timer_start(struct k_timer *timer, k_timeout_t duration,
* argument the same way k_sleep() does), but historical. The
* timer_api test relies on this behavior.
*/
if (period.ticks != 0 && Z_TICK_ABS(period.ticks) < 0) {
if (!K_TIMEOUT_EQ(period, K_FOREVER) && period.ticks != 0 &&
Z_TICK_ABS(period.ticks) < 0) {
period.ticks = MAX(period.ticks - 1, 1);
}
if (Z_TICK_ABS(duration.ticks) < 0) {