Re: [PATCH] can: c_can: convert to use devm * api

From: Marc Kleine-Budde
Date: Sun Jun 22 2014 - 06:56:47 EST


On 06/20/2014 01:59 PM, Lad, Prabhakar wrote:
> From: "Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx>
>
> this patch uses devm_* APIs as they are device managed
> and make code simpler.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>

Thanks for the patch. Applied to can-next with minor change (see inline).

> ---
> Note: This patch is compile tested only.
>
> drivers/net/can/c_can/c_can_platform.c | 41 ++++++++--------------------------
> 1 file changed, 9 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c
> index 1df0b32..e0dcbcf 100644
> --- a/drivers/net/can/c_can/c_can_platform.c
> +++ b/drivers/net/can/c_can/c_can_platform.c
> @@ -157,40 +157,31 @@ static int c_can_plat_probe(struct platform_device *pdev)
> }
>
> /* get the appropriate clk */
> - clk = clk_get(&pdev->dev, NULL);
> + clk = devm_clk_get(&pdev->dev, NULL);
> if (IS_ERR(clk)) {
> - dev_err(&pdev->dev, "no clock defined\n");
> - ret = -ENODEV;
> + ret = PTR_ERR(clk);
> goto exit;
> }
>
> /* get the platform data */
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> irq = platform_get_irq(pdev, 0);
> - if (!mem || irq <= 0) {
> - ret = -ENODEV;
> - goto exit_free_clk;
> - }
> -
> - if (!request_mem_region(mem->start, resource_size(mem),
> - KBUILD_MODNAME)) {
> - dev_err(&pdev->dev, "resource unavailable\n");
> + if (irq <= 0) {
> ret = -ENODEV;
> - goto exit_free_clk;
> + goto exit;
> }
>
> - addr = ioremap(mem->start, resource_size(mem));
> - if (!addr) {
> - dev_err(&pdev->dev, "failed to map can port\n");
> - ret = -ENOMEM;
> - goto exit_release_mem;

I've moved the mem = platform_get_resource() for slightly better
readability here....

> + addr = devm_ioremap_resource(&pdev->dev, mem);
> + if (IS_ERR(addr)) {
> + ret = PTR_ERR(addr);
> + goto exit;
> }

Thanks,
Marc

--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |

Attachment: signature.asc
Description: OpenPGP digital signature