From 9d4cba66a74cbdf25f43a7a8cc360370214ba5fc Mon Sep 17 00:00:00 2001 From: "Joe.C" <yingjoe.chen@mediatek.com> Date: Fri, 1 May 2015 15:43:24 +0800 Subject: [PATCH 39/76] clocksource: mediatek: Don't run event_handler if it is NULL Spurious timer interrupt is noticed in mtk timer and cause kernel crash. In mtk_timer_interrupt(), only run event_handler if it is not NULL. Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com> --- drivers/clocksource/mtk_timer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/clocksource/mtk_timer.c +++ b/drivers/clocksource/mtk_timer.c @@ -143,7 +143,8 @@ static irqreturn_t mtk_timer_interrupt(i /* Acknowledge timer0 irq */ writel(GPT_IRQ_ACK(GPT_CLK_EVT), evt->gpt_base + GPT_IRQ_ACK_REG); - evt->dev.event_handler(&evt->dev); + if (evt->dev.event_handler) + evt->dev.event_handler(&evt->dev); return IRQ_HANDLED; }