Re: [PATCH 3/29] drivers/gpio: simplify use of devm_ioremap_resource

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Aug 14, 2013 at 2:41 PM, Julia Lawall <Julia.Lawall@xxxxxxx> wrote:
> From: Julia Lawall <Julia.Lawall@xxxxxxx>
>
> Remove unneeded error handling on the result of a call to
> platform_get_resource when the value is passed to devm_ioremap_resource.
>
> Move the call to platform_get_resource adjacent to the call to
> devm_ioremap_resource to make the connection between them more clear.
>
> A simplified version of the semantic patch that makes this change is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> expression pdev,res,n,e,e1;
> expression ret != 0;
> identifier l;
> @@
>
> - res = platform_get_resource(pdev, IORESOURCE_MEM, n);
>   ... when != res
> - if (res == NULL) { ... \(goto l;\|return ret;\) }
>   ... when != res
> + res = platform_get_resource(pdev, IORESOURCE_MEM, n);
>   e = devm_ioremap_resource(e1, res);
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>
>
> ---

>  drivers/gpio/gpio-spear-spics.c |    7 +------
>  2 files changed, 2 insertions(+), 12 deletions(-)

For SPEAr:

Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

> diff --git a/drivers/gpio/gpio-spear-spics.c b/drivers/gpio/gpio-spear-spics.c
> index 7a4bf7c..e9a0415 100644
> --- a/drivers/gpio/gpio-spear-spics.c
> +++ b/drivers/gpio/gpio-spear-spics.c
> @@ -128,18 +128,13 @@ static int spics_gpio_probe(struct platform_device *pdev)
>         struct resource *res;
>         int ret;
>
> -       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -       if (!res) {
> -               dev_err(&pdev->dev, "invalid IORESOURCE_MEM\n");
> -               return -EBUSY;
> -       }
> -
>         spics = devm_kzalloc(&pdev->dev, sizeof(*spics), GFP_KERNEL);
>         if (!spics) {
>                 dev_err(&pdev->dev, "memory allocation fail\n");
>                 return -ENOMEM;
>         }
>
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>         spics->base = devm_ioremap_resource(&pdev->dev, res);
>         if (IS_ERR(spics->base))
>                 return PTR_ERR(spics->base);
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Kernel Development]     [Kernel Announce]     [Kernel Newbies]     [Linux Networking Development]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Device Mapper]

  Powered by Linux