linux-kernel - Re: [PATCH] bfin_can: rewrite the blackfin CAN driver into arch independent style

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Date:	Wed, 07 Jan 2015 15:36:17 +0100
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Aaron Wu <Aaron.wu@...log.com>,
	adi-buildroot-devel@...ts.sourceforge.net, wg@...ndegger.com,
	linux-can@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bfin_can: rewrite the blackfin CAN driver into arch independent
 style

On 12/24/2014 04:30 AM, Aaron Wu wrote:
> Rewrite the blackfin CAN driver into arch independent style
> 
> Signed-off-by: Aaron Wu <Aaron.wu@...log.com>

[...]

> @@ -547,6 +543,11 @@ static int bfin_can_probe(struct platform_device *pdev)
>  	}
>  
>  	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (res_mem == NULL) {
> +		dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
> +		return -ENOENT;
> +	}
> +
>  	rx_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>  	tx_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
>  	err_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
> @@ -555,12 +556,6 @@ static int bfin_can_probe(struct platform_device *pdev)
>  		goto exit;
>  	}
>  
> -	if (!request_mem_region(res_mem->start, resource_size(res_mem),
> -				dev_name(&pdev->dev))) {
> -		err = -EBUSY;
> -		goto exit;
> -	}

You should remove the corresponding release_mem_region() from the
remove() function, too.

> -
>  	/* request peripheral pins */
>  	err = peripheral_request_list(pdata, dev_name(&pdev->dev));
>  	if (err)
> @@ -573,7 +568,13 @@ static int bfin_can_probe(struct platform_device *pdev)
>  	}
>  
>  	priv = netdev_priv(dev);
> -	priv->membase = (void __iomem *)res_mem->start;
> +
> +	priv->membase = devm_ioremap_resource(&pdev->dev, res_mem);
> +	if (IS_ERR((void *)priv->membase)) {
> +		dev_err(&pdev->dev, "Cannot map IO\n");
> +		return PTR_ERR((void *)priv->membase);

Is this cast still needed?

Can you move the devm_ conversion into a separate patch?

Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
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