linux-kernel - Re: [PATCHv2 4/4] clocksource: tcb_clksrc: unprepare clock in case of failure

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Date:	Wed, 03 Sep 2014 11:49:15 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Gaël PORTAY <g.portay@...rkiz.com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pwm@...r.kernel.org, Nicolas Ferre <nicolas.ferre@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Thierry Reding <thierry.reding@...il.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Subject: Re: [PATCHv2 4/4] clocksource: tcb_clksrc: unprepare clock in case
 of failure

On 08/29/2014 06:16 PM, Gaël PORTAY wrote:
> The clock is not unprepared in case of the request IRQ fails.
>
> Also update to request_irq.
>
> Signed-off-by: Gaël PORTAY <g.portay@...rkiz.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> ---
>   drivers/clocksource/tcb_clksrc.c | 13 ++++---------
>   1 file changed, 4 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
> index f922e81..8bdbc45 100644
> --- a/drivers/clocksource/tcb_clksrc.c
> +++ b/drivers/clocksource/tcb_clksrc.c
> @@ -178,12 +178,6 @@ static irqreturn_t ch2_irq(int irq, void *handle)
>   	return IRQ_NONE;
>   }
>
> -static struct irqaction tc_irqaction = {
> -	.name		= "tc_clkevt",
> -	.flags		= IRQF_TIMER,
> -	.handler	= ch2_irq,
> -};
> -
>   static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
>   {
>   	int ret;
> @@ -198,15 +192,16 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
>
>   	clkevt.regs = tc->regs;
>   	clkevt.clk = t2_clk;
> -	tc_irqaction.dev_id = &clkevt;
>
>   	timer_clock = clk32k_divisor_idx;
>
>   	clkevt.clkevt.cpumask = cpumask_of(0);
>
> -	ret = setup_irq(irq, &tc_irqaction);
> -	if (ret)
> +	ret = request_irq(irq, ch2_irq, IRQF_TIMER, "tc_clkevt", &clkevt);
> +	if (ret) {
> +		clk_disable_unprepare(t2_clk);
>   		return ret;
> +	}
>
>   	clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff);
>
>


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