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clocksource/drivers/timer-riscv: Stop stimecmp when cpu hotplug

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Stop the timer when the cpu is going to be offline otherwise the
timer interrupt may be pending while performing power-down.

Suggested-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/lkml/20240829033904.477200-3-nick.hu@sifive.com/T/#u
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20250219114135.27764-3-nick.hu@sifive.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
This commit is contained in:
Nick Hu 2025-02-19 19:41:35 +08:00 committed by Alexandre Ghiti
parent ffef54ad41
commit 70c93b026e
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GPG Key ID: 643FB2BC9285EF8A
1 changed files with 6 additions and 0 deletions
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6
drivers/clocksource/timer-riscv.c
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@ -126,7 +126,13 @@ static int riscv_timer_starting_cpu(unsigned int cpu)
static int riscv_timer_dying_cpu(unsigned int cpu)
{
/*
* Stop the timer when the cpu is going to be offline otherwise
* the timer interrupt may be pending while performing power-down.
*/
riscv_clock_event_stop();
disable_percpu_irq(riscv_clock_event_irq);
return 0;
}