linux-kernel - Re: [PATCH v2] pinctrl: qcom: remove gpiochip in failure cases

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Message-ID: <54015A97.4020406@smartplayin.com>
Date:	Sat, 30 Aug 2014 10:31:11 +0530
From:	Pramod Gurav <pramod.gurav@...rtplayin.com>
To:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	"Ivan T. Ivanov" <iivanov@...sol.com>
Subject: Re: [PATCH v2] pinctrl: qcom: remove gpiochip in failure cases

Hi Bjorn,


On 30-08-2014 12:27 AM, Bjorn Andersson wrote:
> On Fri 29 Aug 01:11 PDT 2014, Pramod Gurav wrote:
> 
>> This patch releases gpiochip related resources by calling
>> gpiochip_remove when either of gpiochip_add_pin_range and
>> gpiochip_irqchip_add fails.
>>
>> CC: Linus Walleij <linus.walleij@...aro.org>
>> CC: Bjorn Andersson <bjorn.andersson@...ymobile.com>
>> CC: "Ivan T. Ivanov" <iivanov@...sol.com>
>> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
> 
> Acked-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
> 
>> ---
>>
>> Changes since v1:
>> - In v1 of this patch gpiochip_remove was called only in failure case of
>>   gpiochip_irqchip_add. This patchs adds a call to gpiochip_remove in failure
>>   case of gpiochip_add_pin_range as well.
>>
>>  drivers/pinctrl/qcom/pinctrl-msm.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
>> index 2738108..9175bbc 100644
>> --- a/drivers/pinctrl/qcom/pinctrl-msm.c
>> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c
>> @@ -829,6 +829,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
>>  	ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev), 0, 0, chip->ngpio);
>>  	if (ret) {
>>  		dev_err(pctrl->dev, "Failed to add pin range\n");
>> +		gpiochip_remove(&pctrl->chip);
>>  		return ret;
>>  	}
>>  
>> @@ -839,6 +840,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
>>  				   IRQ_TYPE_NONE);
>>  	if (ret) {
>>  		dev_err(pctrl->dev, "Failed to add irqchip to gpiochip\n");
>> +		gpiochip_remove(&pctrl->chip);
>>  		return -ENOSYS;
>>  	}
>>  
> 
> It seems like pinctrl-st.c and pinctrl-sirf.c is suffering the same problem,
> would you mind spinning patches for those too?
Sure. Was browsing files but I was caught by this thing called sleep
before I catch anything. :) Thanks for pointing them out. Will do it.

> 
> Regards,
> Bjorn
> --
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