netdev - Re: [PATCH] net: ethernet: freescale: use devm_ioremap

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Date:	Tue, 14 May 2013 14:21:53 +0800
From:	Frank Li <lznuaa@...il.com>
To:	Laurent Navet <laurent.navet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	"Frank.Li@...escale.com" <Frank.Li@...escale.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>, joe@...ches.com,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: ethernet: freescale: use devm_ioremap_resource()

2013/5/14 Laurent Navet <laurent.navet@...il.com>:
> Replace a call to deprecated devm_request_and_ioremap by devm_ioremap_resource.
> also remove tests on 'r' since devm_ioremap_resource() checks for it
> in a better way.
>
> Found with coccicheck and this semantic patch:
>  scripts/coccinelle/api/devm_ioremap_resource.cocci
>
> Signed-off-by: Laurent Navet <laurent.navet@...il.com>
> ---
>  drivers/net/ethernet/freescale/fec_main.c |   13 +++++--------
>  1 file changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
> index aff0310..0afc7ff 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -1843,8 +1843,6 @@ fec_probe(struct platform_device *pdev)
>                 pdev->id_entry = of_id->data;
>
>         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -       if (!r)
> -               return -ENXIO;
>

why remove this check?

>         /* Init network device */
>         ndev = alloc_etherdev(sizeof(struct fec_enet_private));
> @@ -1861,17 +1859,16 @@ fec_probe(struct platform_device *pdev)
>             (pdev->id_entry->driver_data & FEC_QUIRK_HAS_GBIT))
>                 fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG;
>
> -       fep->hwp = devm_request_and_ioremap(&pdev->dev, r);
> +       fep->hwp = devm_ioremap_resource(&pdev->dev, r);
> +       if (IS_ERR(fep->hwp)) {
> +               ret = PTR_ERR(fep->hwp);
> +               goto failed_ioremap;
> +       }
>         fep->pdev = pdev;
>         fep->dev_id = dev_id++;
>
>         fep->bufdesc_ex = 0;
>
> -       if (!fep->hwp) {
> -               ret = -ENOMEM;
> -               goto failed_ioremap;
> -       }
> -
>         platform_set_drvdata(pdev, ndev);
>
>         ret = of_get_phy_mode(pdev->dev.of_node);
> --
> 1.7.10.4
>
> --
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