From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Yingjoe Chen <yingjoe.chen@mediatek.com>,
Mark Rutland <mark.rutland@arm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>
Cc: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Russell King <linux@arm.linux.org.uk>,
Jason Cooper <jason@lakedaemon.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Carino <marc.ceeeee@gmail.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com,
Sascha Hauer <kernel@pengutronix.de>
Subject: Re: [PATCH 1/7] clocksource: mediatek: Don't run event_handler if it is NULL
Date: Mon, 04 May 2015 10:14:56 +0200 [thread overview]
Message-ID: <55472A80.9020904@linaro.org> (raw)
In-Reply-To: <1430466210-22963-2-git-send-email-yingjoe.chen@mediatek.com>
On 05/01/2015 09:43 AM, Yingjoe Chen wrote:
> 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;
> }
>
This fix does not look good.
Could you try by requesting the irq *after*
clockevents_config_and_register in the init sequence [1] ?
Thanks
-- Daniel
[1]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1096be084ac59927158ce80ff1d31c33eed0e565
--
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next prev parent reply other threads:[~2015-05-04 8:15 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-01 7:43 [PATCH 0/7] Add SMP bringup support for mt65xx socs Yingjoe Chen
2015-05-01 7:43 ` [PATCH 1/7] clocksource: mediatek: Don't run event_handler if it is NULL Yingjoe Chen
2015-05-04 8:14 ` Daniel Lezcano [this message]
2015-05-04 8:34 ` Matthias Brugger
2015-05-04 8:44 ` Daniel Lezcano
2015-05-04 15:13 ` Yingjoe Chen
2015-05-01 7:43 ` [PATCH 2/7] clocksource: mediatek: Use GPT as sched clock source Yingjoe Chen
2015-05-01 7:43 ` [PATCH 3/7] arm: mediatek: enable gpt6 on boot up to make arch timer working Yingjoe Chen
2015-05-01 7:43 ` [PATCH 4/7] devicetree: bindings: add new SMP enable method Mediatek SoC Yingjoe Chen
2015-05-01 7:43 ` [PATCH 5/7] ARM: mediatek: add smp bringup code Yingjoe Chen
2015-05-06 8:38 ` Matthias Brugger
2015-05-01 7:43 ` [PATCH 6/7] ARM: dts: mt8135: enable basic SMP bringup for mt8135 Yingjoe Chen
2015-05-04 7:08 ` Matthias Brugger
2015-05-04 14:31 ` Sascha Hauer
2015-05-05 5:37 ` Yingjoe Chen
2015-05-01 7:43 ` [PATCH 7/7] ARM: dts: mt8127: enable basic SMP bringup for mt8127 Yingjoe Chen
2015-05-04 7:48 ` [PATCH 0/7] Add SMP bringup support for mt65xx socs Matthias Brugger
2015-05-06 7:19 ` Yingjoe Chen
2015-05-06 7:59 ` Yingjoe Chen
2015-05-06 8:29 ` Matthias Brugger
2015-05-06 11:04 ` Matthias Brugger
2015-05-16 8:09 ` Yingjoe Chen
2015-05-16 9:11 ` Matthias Brugger
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