set_state_oneshot_stopped() is called by the clkevt core, when the next event is required at an expiry time of 'KTIME_MAX'. This normally happens with NO_HZ_{IDLE|FULL} in both LOWRES/HIGHRES modes.
This patch makes the clockevent device to stop on such an event, to avoid spurious interrupts, as explained by: commit 8fff52fd5093 ("clockevents: Introduce CLOCK_EVT_STATE_ONESHOT_STOPPED state").
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- drivers/clocksource/arm_arch_timer.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index c64d543d64bf..c816823888c0 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -266,10 +266,12 @@ static void __arch_timer_setup(unsigned type, if (arch_timer_use_virtual) { clk->irq = arch_timer_ppi[VIRT_PPI]; clk->set_state_shutdown = arch_timer_shutdown_virt; + clk->set_state_oneshot_stopped = arch_timer_shutdown_virt; clk->set_next_event = arch_timer_set_next_event_virt; } else { clk->irq = arch_timer_ppi[PHYS_SECURE_PPI]; clk->set_state_shutdown = arch_timer_shutdown_phys; + clk->set_state_oneshot_stopped = arch_timer_shutdown_phys; clk->set_next_event = arch_timer_set_next_event_phys; } } else { @@ -279,10 +281,12 @@ static void __arch_timer_setup(unsigned type, clk->cpumask = cpu_all_mask; if (arch_timer_mem_use_virtual) { clk->set_state_shutdown = arch_timer_shutdown_virt_mem; + clk->set_state_oneshot_stopped = arch_timer_shutdown_virt_mem; clk->set_next_event = arch_timer_set_next_event_virt_mem; } else { clk->set_state_shutdown = arch_timer_shutdown_phys_mem; + clk->set_state_oneshot_stopped = arch_timer_shutdown_phys_mem; clk->set_next_event = arch_timer_set_next_event_phys_mem; }