From: Sascha Hauer <s.hauer@pengutronix.de>
To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: andrew-ct.chen@mediatek.com,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
srv_heupstream@mediatek.com
Subject: Re: [PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver
Date: Mon, 26 Oct 2015 11:28:34 +0100 [thread overview]
Message-ID: <20151026102834.GE25308@pengutronix.de> (raw)
In-Reply-To: <562DF8C8.8060600@linaro.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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next prev parent reply other threads:[~2015-10-26 10:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 8:39 [PATCH 0/3] Mediatek EFUSE Support andrew-ct.chen
2015-10-16 8:39 ` [PATCH 1/3] dt-bindings: add document of mediatek efuse driver andrew-ct.chen
2015-10-26 9:56 ` Srinivas Kandagatla
2015-10-26 10:23 ` Sascha Hauer
2015-10-26 10:55 ` Srinivas Kandagatla
2015-10-27 5:32 ` andrew-ct chen
2015-10-27 9:27 ` andrew-ct chen
2015-10-16 8:39 ` [PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver andrew-ct.chen
2015-10-26 9:56 ` Srinivas Kandagatla
2015-10-26 10:28 ` Sascha Hauer [this message]
2015-10-26 10:39 ` Srinivas Kandagatla
2015-10-27 5:32 ` andrew-ct chen
2015-10-27 9:28 ` andrew-ct chen
2015-10-16 8:39 ` [PATCH 3/3] dts: arm64: Add EFUSE device node andrew-ct.chen
2015-10-19 6:49 ` [PATCH 0/3] Mediatek EFUSE Support Sascha Hauer
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