linux-kernel - Re: [PATCH -next] ARM: imx: add missing clk_disable_unprepare() in imx_mmdc

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Date:   Mon, 24 May 2021 09:33:42 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-imx@....com>
Subject: Re: [PATCH -next] ARM: imx: add missing clk_disable_unprepare() in
 imx_mmdc_remove()


On 2021/5/23 13:11, Shawn Guo wrote:
> On Mon, May 17, 2021 at 07:15:23PM +0800, Yang Yingliang wrote:
>> clock source is prepared and enabled by clk_prepare_enable()
>> in probe function, but no disable or unprepare in remove.
>>
>> Fixes: 9454a0caff6a ("ARM: imx: add mmdc ipg clock operation for mmdc")
>> Reported-by: Hulk Robot <hulkci@...wei.com>
>> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
>> ---
>>   arch/arm/mach-imx/mmdc.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
>> index 0dfd0ae7a63d..7d87fa8c70a9 100644
>> --- a/arch/arm/mach-imx/mmdc.c
>> +++ b/arch/arm/mach-imx/mmdc.c
>> @@ -77,6 +77,7 @@ static const struct of_device_id imx_mmdc_dt_ids[] = {
>>   	{ /* sentinel */ }
>>   };
>>   
>> +struct clk *mmdc_ipg_clk;
> Missing static.  But an even better change should be putting it into
> struct mmdc_pmu, I guess.

OK, I will send a v2 later.

Thanks,

Yang

>
> Shawn
>
>>   #ifdef CONFIG_PERF_EVENTS
>>   
>>   static enum cpuhp_state cpuhp_mmdc_state;
>> @@ -463,6 +464,7 @@ static int imx_mmdc_remove(struct platform_device *pdev)
>>   	cpuhp_state_remove_instance_nocalls(cpuhp_mmdc_state, &pmu_mmdc->node);
>>   	perf_pmu_unregister(&pmu_mmdc->pmu);
>>   	kfree(pmu_mmdc);
>> +	clk_disable_unprepare(mmdc_ipg_clk);
>>   	return 0;
>>   }
>>   
>> @@ -536,7 +538,6 @@ static int imx_mmdc_probe(struct platform_device *pdev)
>>   {
>>   	struct device_node *np = pdev->dev.of_node;
>>   	void __iomem *mmdc_base, *reg;
>> -	struct clk *mmdc_ipg_clk;
>>   	u32 val;
>>   	int err;
>>   
>> -- 
>> 2.25.1
>>
> .