linux-kernel - Re: [PATCH 2/3] usb: ohci-at91: replace request_mem_region + ioremap by devm_request_and

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Message-ID: <529DE733.60400@atmel.com>
Date:	Tue, 3 Dec 2013 15:14:11 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Boris BREZILLON <b.brezillon@...rkiz.com>,
	Douglas Gilbert <dgilbert@...erlog.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Grant Likely <grant.likely@...aro.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/3] usb: ohci-at91: replace request_mem_region + ioremap
 by devm_request_and_ioremap

On 03/12/2013 15:07, Boris BREZILLON :
> Replace the request_mem_region + ioremap calls by the
> devm_request_and_ioremap call which does the same things but with device
> managed resources.
>
> Signed-off-by: Boris BREZILLON <b.brezillon@...rkiz.com>
> Tested-by: Robert Nelson <robertcnelson@...il.com>

Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>

> ---
>   drivers/usb/host/ohci-at91.c |   24 +++++-------------------
>   1 file changed, 5 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
> index 7aec6ca..c406f1e 100644
> --- a/drivers/usb/host/ohci-at91.c
> +++ b/drivers/usb/host/ohci-at91.c
> @@ -157,24 +157,18 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
>   	hcd->rsrc_start = mem_r->start;
>   	hcd->rsrc_len = resource_size(mem_r);
>
> -	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
> -		pr_debug("request_mem_region failed\n");
> -		retval = -EBUSY;
> -		goto err1;
> -	}
> -
> -	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
> +	hcd->regs = devm_request_and_ioremap(&pdev->dev, mem_r);
>   	if (!hcd->regs) {
> -		pr_debug("ioremap failed\n");
> +		dev_dbg(dev, "devm_request_and_ioremap failed\n");
>   		retval = -EIO;
> -		goto err2;
> +		goto err;
>   	}
>
>   	iclk = clk_get(&pdev->dev, "ohci_clk");
>   	if (IS_ERR(iclk)) {
>   		dev_err(&pdev->dev, "failed to get ohci_clk\n");
>   		retval = PTR_ERR(iclk);
> -		goto err3;
> +		goto err;
>   	}
>   	fclk = clk_get(&pdev->dev, "uhpck");
>   	if (IS_ERR(fclk)) {
> @@ -218,13 +212,7 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
>    err4:
>   	clk_put(iclk);
>
> - err3:
> -	iounmap(hcd->regs);
> -
> - err2:
> -	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
> -
> - err1:
> + err:
>   	usb_put_hcd(hcd);
>   	return retval;
>   }
> @@ -247,8 +235,6 @@ static void usb_hcd_at91_remove(struct usb_hcd *hcd,
>   {
>   	usb_remove_hcd(hcd);
>   	at91_stop_hc(pdev);
> -	iounmap(hcd->regs);
> -	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
>   	usb_put_hcd(hcd);
>
>   	if (IS_ENABLED(CONFIG_COMMON_CLK))
>


-- 
Nicolas Ferre
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