From dde7d61e7f9bf0e844df375412ec5d51650db486 Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Tue, 8 Nov 2011 10:34:09 -0800 Subject: [PATCH] msm: timer: Setup interrupt after registering clockevent Some bootloaders may leave a pending interrupt for the timer and thus msm_timer_interrupt() has a check for a NULL event handler. Unmask and register for the interrupt after registering the clockevent so that we can get the NULL pointer check out of the fast path. Signed-off-by: Stephen Boyd Cc: Thomas Gleixner Cc: Marc Zyngier Signed-off-by: David Brown --- arch/arm/mach-msm/timer.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index ca0a957d8626..3d80fbf34165 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -47,8 +47,6 @@ static void __iomem *event_base; static irqreturn_t msm_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *evt = *(struct clock_event_device **)dev_id; - if (evt->event_handler == NULL) - return IRQ_HANDLED; /* Stop the timer tick */ if (evt->mode == CLOCK_EVT_MODE_ONESHOT) { u32 ctrl = readl_relaxed(event_base + TIMER_ENABLE); @@ -174,6 +172,7 @@ static void __init msm_timer_init(void) ce->cpumask = cpumask_of(0); ce->irq = INT_GP_TIMER_EXP; + clockevents_register_device(ce); if (cpu_is_msm8x60() || cpu_is_msm8960()) { msm_evt.percpu_evt = alloc_percpu(struct clock_event_device *); if (!msm_evt.percpu_evt) { @@ -194,7 +193,6 @@ static void __init msm_timer_init(void) if (res) pr_err("request_irq failed for %s\n", ce->name); - clockevents_register_device(ce); err: writel_relaxed(TIMER_ENABLE_EN, source_base + TIMER_ENABLE); res = clocksource_register_hz(cs, dgt_hz); @@ -224,8 +222,8 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt) evt->min_delta_ns = clockevent_delta2ns(4, evt); *__this_cpu_ptr(msm_evt.percpu_evt) = evt; - enable_percpu_irq(evt->irq, 0); clockevents_register_device(evt); + enable_percpu_irq(evt->irq, 0); return 0; } -- 2.34.1