linux-kernel - Re: [PATCH 2/4] gpio: davinci: Handle the return value of davinci_gpio_irq

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Date:   Thu, 20 Jul 2017 12:14:58 +0530
From:   Keerthy <j-keerthy@...com>
To:     Johan Hovold <johan@...nel.org>
CC:     <linus.walleij@...aro.org>, <ssantosh@...nel.org>,
        <devicetree@...r.kernel.org>, <nsekhar@...com>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <robh+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <fcooper@...com>
Subject: Re: [PATCH 2/4] gpio: davinci: Handle the return value of
 davinci_gpio_irq_setup function



On Wednesday 19 July 2017 04:40 PM, Johan Hovold wrote:
> On Tue, Jul 18, 2017 at 04:27:14PM +0530, Keerthy wrote:
>> Currently davinci_gpio_irq_setup return value is ignored. Handle the
>> return value appropriately.
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>  drivers/gpio/gpio-davinci.c | 18 +++++++++++++-----
>>  1 file changed, 13 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
>> index 2c88054..932f270 100644
>> --- a/drivers/gpio/gpio-davinci.c
>> +++ b/drivers/gpio/gpio-davinci.c
>> @@ -233,15 +233,23 @@ static int davinci_gpio_probe(struct platform_device *pdev)
>>  		chips->regs[bank] = gpio_base + offset_array[bank];
>>  
>>  	ret = devm_gpiochip_add_data(dev, &chips->chip, chips);
>> +	if (ret)
>> +		goto err;
>> +
>> +	platform_set_drvdata(pdev, chips);
>> +	ret = davinci_gpio_irq_setup(pdev);
>>  	if (ret) {
>> -		ctrl_num = 0;
>> -		bank_base = 0;
>> -		return ret;
>> +		platform_set_drvdata(pdev, NULL);
>> +		goto err;
>>  	}
>>  
>> -	platform_set_drvdata(pdev, chips);
>> -	davinci_gpio_irq_setup(pdev);
>>  	return 0;
> 
> There's a separate but related bug here too as the clk_prepare_enable()
> in davinci_gpio_irq_setup() is never balanced on driver unbind.

Yes Johan. I will send that as a separate patch.

> 
> Johan
>