Re: [PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver

[Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>]

On Mon, Oct 26, 2015 at 09:56:24AM +0000, Srinivas Kandagatla wrote:
> >+	.val_bits = 32,
> >+	.reg_stride = 4,
> >+};
> >+
> >+static int mtk_efuse_probe(struct platform_device *pdev)
> >+{
> >+	struct device *dev = &pdev->dev;
> >+	struct resource *res;
> >+	struct nvmem_device *nvmem;
> >+	struct nvmem_config *econfig;
> >+	struct regmap *regmap;
> >+	void __iomem *base;
> >+
> >+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >+	base = devm_ioremap_resource(dev, res);
> >+	if (IS_ERR(base))
> >+		return PTR_ERR(base);
> >+
> >+	econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
> >+	if (!econfig)
> >+		return -ENOMEM;
> Why not use static econfig variable?

Because drivers should not assume there is only one instance of them in
the system. The qfprom driver does this and it's only a matter of
putting a second qcom,qfprom node into the device tree to break the
driver.

Sascha

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