Hi Dong,
On Tue, Sep 04, 2012 at 11:20:08AM +0800, Dong Aisheng wrote:
> +static int __devinit syscon_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
Do we really need this variable? Anyway you are using it only
once in the dev_info.
> + struct device_node *np = dev->of_node;
> + struct syscon *syscon;
> + struct resource res;
> + int ret;
> +
> + if (!np)
> + return -ENOENT;
> +
> + syscon = devm_kzalloc(&pdev->dev, sizeof(struct syscon),
> + GFP_KERNEL);
> + if (!syscon)
> + return -ENOMEM;
> +
> + syscon->base = of_iomap(np, 0);
> + if (!syscon->base)
> + return -EADDRNOTAVAIL;
> +
> + ret = of_address_to_resource(np, 0, &res);
> + if (ret)
> + return ret;
> +
> + syscon_regmap_config.max_register = res.end - res.start - 3;
> + syscon->regmap = devm_regmap_init_mmio(&pdev->dev, syscon->base,
> + &syscon_regmap_config);
> + if (IS_ERR(syscon->regmap)) {
> + dev_err(&pdev->dev, "regmap init failed\n");
> + return PTR_ERR(syscon->regmap);
> + }
> +
> + syscon->dev = &pdev->dev;
> + platform_set_drvdata(pdev, syscon);
> +
> + dev_info(dev, "syscon regmap start 0x%x end 0x%x registered\n",
> + res.start, res.end);
> +
> + return 0;
in case of error you are not freeing syscon.
Moreover, in my opinion, some dev_err more should not heart
Andi
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