linux-kernel - Re: [patch] usb: phy: msm: devm_ioremap() doesn't return ERR

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Message-ID: <CAOMZO5D7djkVN0sV6ynCqkqtq0XsoFyyNoxva=JLyuWpU3BtwA@mail.gmail.com>
Date:	Wed, 14 May 2014 10:18:59 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	USB list <linux-usb@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] usb: phy: msm: devm_ioremap() doesn't return ERR_PTRs

On Wed, May 14, 2014 at 9:55 AM, Dan Carpenter <dan.carpenter@...cle.com> wrote:
> devm_ioremap() returns a NULL on error so the IS_ERR() check needs to be
> updated.
>
> Fixes: 6b99c68ec1f9 ('usb: phy: msm: Migrate to Managed Device Resource allocation')
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>
> diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
> index c522c4f..bd32257 100644
> --- a/drivers/usb/phy/phy-msm-usb.c
> +++ b/drivers/usb/phy/phy-msm-usb.c
> @@ -1587,8 +1587,8 @@ static int msm_otg_probe(struct platform_device *pdev)
>
>         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>         motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> -       if (IS_ERR(motg->regs))
> -               return PTR_ERR(motg->regs);
> +       if (!motg->regs)
> +               return -ENOMEM;

What about doing devm_ioremap_resource() instead?
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