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.ku...@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;
}
--
2.7.0.rc1.186.g94414c4
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