2015-11-02 10:18:50 +00:00
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From 9d4cba66a74cbdf25f43a7a8cc360370214ba5fc Mon Sep 17 00:00:00 2001
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From: "Joe.C" <yingjoe.chen@mediatek.com>
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Date: Fri, 1 May 2015 15:43:24 +0800
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Subject: [PATCH 39/76] clocksource: mediatek: Don't run event_handler if it
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is NULL
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Spurious timer interrupt is noticed in mtk timer and cause kernel
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crash. In mtk_timer_interrupt(), only run event_handler if it is
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not NULL.
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Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
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---
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drivers/clocksource/mtk_timer.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/clocksource/mtk_timer.c
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+++ b/drivers/clocksource/mtk_timer.c
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2015-12-02 21:52:41 +00:00
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@@ -143,7 +143,8 @@ static irqreturn_t mtk_timer_interrupt(i
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2015-11-02 10:18:50 +00:00
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/* Acknowledge timer0 irq */
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writel(GPT_IRQ_ACK(GPT_CLK_EVT), evt->gpt_base + GPT_IRQ_ACK_REG);
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- evt->dev.event_handler(&evt->dev);
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+ if (evt->dev.event_handler)
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+ evt->dev.event_handler(&evt->dev);
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return IRQ_HANDLED;
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}
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