openwrtv3/target/linux/mediatek/patches/0039-clocksource-mediatek-Don-t-run-event_handler-if-it-i.patch
John Crispin 25afe99b31 mediatek: add support for the new MT7623 Arm SoC
the support is still WIP. next steps are to make the pmic and ethernet work.
this is the first commit to make sure nothing gets lost.

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 47354
2015-11-02 10:18:50 +00:00

32 lines
1 KiB
Diff

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(-)
diff --git a/drivers/clocksource/mtk_timer.c b/drivers/clocksource/mtk_timer.c
index 68ab423..85e0ab5 100644
--- a/drivers/clocksource/mtk_timer.c
+++ b/drivers/clocksource/mtk_timer.c
@@ -143,7 +143,8 @@ static irqreturn_t mtk_timer_interrupt(int irq, void *dev_id)
/* 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;
}
--
1.7.10.4