linux-kernel - Re: [PATCH 2/4] pinctrl: at91: Fix failure path in at91_gpio

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Date:	Fri, 5 Sep 2014 10:22:25 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Pramod Gurav <pramod.gurav@...rtplayin.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Subject: Re: [PATCH 2/4] pinctrl: at91: Fix failure path in at91_gpio_probe path

On Sun, Aug 31, 2014 at 1:21 PM, Pramod Gurav
<pramod.gurav@...rtplayin.com> wrote:

> This fixes the whole error handling in probe function by capturing and
> returning error values on kernel function like clk_prepare,
> clk_enable, gpiochip_add etc.
>
> CC: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
> CC: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
> ---
>  drivers/pinctrl/pinctrl-at91.c |   20 +++++++++++++-------
>  1 files changed, 13 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index 480460d..7abe683 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -1578,16 +1578,19 @@ static int at91_gpio_probe(struct platform_device *pdev)
>         at91_chip->clock = devm_clk_get(&pdev->dev, NULL);
>         if (IS_ERR(at91_chip->clock)) {
>                 dev_err(&pdev->dev, "failed to get clock, ignoring.\n");
> +               ret = IS_ERR(at91_chip->clock);

No. IS_ERR() returns a bool.

You want to use PTR_ERR().

Yours,
Linus Walleij
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