linux-kernel - Re: [PATCH] pinctrl: qcom: Release pin ranges when gpiochip_irqchip

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Message-ID: <CAJAp7OhnUD3oSLfcRMD3veSJhVQLZdW1FPb8grOYqN5Gh3Oagw@mail.gmail.com>
Date:	Wed, 27 Aug 2014 14:24:53 -0700
From:	Bjorn Andersson <bjorn@...o.se>
To:	Pramod Gurav <pramod.gurav@...rtplayin.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	"Ivan T. Ivanov" <iivanov@...sol.com>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] pinctrl: qcom: Release pin ranges when
 gpiochip_irqchip_add fails

On Wed, Aug 27, 2014 at 3:57 AM, Pramod Gurav
<pramod.gurav@...rtplayin.com> wrote:
> This patches adds a call to gpiochip_remove_pin_ranges when
> gpiochip_irqchip_add fails to release memory allocated for pin_ranges.
>
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
> @@ -845,6 +845,7 @@ 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_pin_ranges(chip);
>                 return -ENOSYS;
>         }

Good catch, I guess this was lost in the introduction of gpiochip_irqchip...


Rather than just releasing the pin_ranges of the gpio_chip you should
probably add a gpiochip_remove() both here and in the case of
gpiochip_add_pin_range() failing.

Regards,
Bjorn
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