linux-kernel - Re: [PATCH v2] scsi: ufs-exynos: use devm_platform_ioremap_resource

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Message-ID: <CAMuHMdVZbAZN41jpRrSUD9F+nkgFBTeFoBEu-bumXciT=o4Svw@mail.gmail.com>
Date:   Thu, 12 Nov 2020 15:06:16 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Bean Huo <huobean@...il.com>
Cc:     alim.akhtar@...sung.com, avri.altman@....com,
        asutoshd@...eaurora.org,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        stanley.chu@...iatek.com,
        Bean Huo 霍斌斌 (beanhuo) 
        <beanhuo@...ron.com>, Bart Van Assche <bvanassche@....org>,
        "Winkler, Tomas" <tomas.winkler@...el.com>, cang@...eaurora.org,
        scsi <linux-scsi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] scsi: ufs-exynos: use devm_platform_ioremap_resource_byname()

Hi Bean,

On Wed, Sep 16, 2020 at 10:43 AM Bean Huo <huobean@...il.com> wrote:
> From: Bean Huo <beanhuo@...ron.com>
>
> Use devm_platform_ioremap_resource_byname() to simplify the code.
>
> Signed-off-by: Bean Huo <beanhuo@...ron.com>

Thanks for your patch, which is now commit 2dd39fad92a1f25f ("scsi: ufs:
ufs-exynos: Use devm_platform_ioremap_resource_byname()") in v5.10-rc1.

> --- a/drivers/scsi/ufs/ufs-exynos.c
> +++ b/drivers/scsi/ufs/ufs-exynos.c
> @@ -940,7 +940,6 @@ static int exynos_ufs_init(struct ufs_hba *hba)
>         struct device *dev = hba->dev;
>         struct platform_device *pdev = to_platform_device(dev);
>         struct exynos_ufs *ufs;
> -       struct resource *res;
>         int ret;
>
>         ufs = devm_kzalloc(dev, sizeof(*ufs), GFP_KERNEL);
> @@ -948,24 +947,21 @@ static int exynos_ufs_init(struct ufs_hba *hba)
>                 return -ENOMEM;
>
>         /* exynos-specific hci */
> -       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vs_hci");
> -       ufs->reg_hci = devm_ioremap_resource(dev, res);
> +       ufs->reg_hci = devm_platform_ioremap_resource_byname(pdev, "vs_hci");

Are you sure this is equivalent?
Before, devm_ioremap_resource() was called on "dev" (hba->dev),
after it is called on "&pdev->dev" .

>         if (IS_ERR(ufs->reg_hci)) {
>                 dev_err(dev, "cannot ioremap for hci vendor register\n");
>                 return PTR_ERR(ufs->reg_hci);
>         }
>
>         /* unipro */
> -       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "unipro");
> -       ufs->reg_unipro = devm_ioremap_resource(dev, res);
> +       ufs->reg_unipro = devm_platform_ioremap_resource_byname(pdev, "unipro");
>         if (IS_ERR(ufs->reg_unipro)) {
>                 dev_err(dev, "cannot ioremap for unipro register\n");
>                 return PTR_ERR(ufs->reg_unipro);
>         }
>
>         /* ufs protector */
> -       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ufsp");
> -       ufs->reg_ufsp = devm_ioremap_resource(dev, res);
> +       ufs->reg_ufsp = devm_platform_ioremap_resource_byname(pdev, "ufsp");
>         if (IS_ERR(ufs->reg_ufsp)) {
>                 dev_err(dev, "cannot ioremap for ufs protector register\n");
>                 return PTR_ERR(ufs->reg_ufsp);

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds