linux-kernel - Re: [PATCH v3 2/3] clk: hisilicon: Add support for Hi3660 stub clocks

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Message-ID: <20171207070550.GY4283@codeaurora.org>
Date:   Wed, 6 Dec 2017 23:05:50 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Xu YiPing <xuyiping@...ilicon.com>
Cc:     mturquette@...libre.com, robh+dt@...nel.org, mark.rutland@....com,
        xuwei5@...ilicon.com, catalin.marinas@....com, will.deacon@....com,
        xuejiancheng@...ilicon.com, wenpan@...ilicon.com,
        leo.yan@...aro.org, zhangfei.gao@...aro.org, guodong.xu@...aro.org,
        zhongkaihua@...wei.com, chenjun14@...wei.com,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        suzhuangluan@...ilicon.com, xuezhiliang@...ilicon.com,
        kevin.wangtao@...ilicon.com
Subject: Re: [PATCH v3 2/3] clk: hisilicon: Add support for Hi3660 stub clocks

On 11/17, Xu YiPing wrote:
> From: Kaihua Zhong <zhongkaihua@...wei.com>
> +
> +static struct clk_hw *hi3660_stub_clk_hw_get(struct of_phandle_args *clkspec,
> +					     void *data)
> +{
> +	unsigned int idx = clkspec->args[0];
> +
> +	if (idx > HI3660_CLK_STUB_NUM) {

This should be >=

> +	}
> +
> +	return &hi3660_stub_clks[idx].hw;
> +}
> +
> +static int hi3660_stub_clk_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct resource *res;
> +	unsigned int i;
> +	int ret;
> +
> +	/* Use mailbox client without blocking */
> +	stub_clk_chan.cl.dev = dev;
> +	stub_clk_chan.cl.tx_done = NULL;
> +	stub_clk_chan.cl.tx_block = false;
> +	stub_clk_chan.cl.knows_txdone = false;
> +
> +	/* Allocate mailbox channel */
> +	stub_clk_chan.mbox = mbox_request_channel(&stub_clk_chan.cl, 0);
> +	if (IS_ERR(stub_clk_chan.mbox))
> +		return PTR_ERR(stub_clk_chan.mbox);
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	freq_reg = devm_ioremap(dev, res->start, resource_size(res));
> +	if (IS_ERR(freq_reg))

Pretty sure this returns NULL on failure, not an error pointer.

> +		return -ENOMEM;
> +
> +	freq_reg += HI3660_STUB_CLOCK_DATA;
> +
> +	for (i = 0; i < HI3660_CLK_STUB_NUM; i++) {
> +		ret = devm_clk_hw_register(&pdev->dev, &hi3660_stub_clks[i].hw);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	ret = of_clk_add_hw_provider(pdev->dev.of_node, hi3660_stub_clk_hw_get,
> +				     hi3660_stub_clks);

This can use devm

> +	return ret;
> +}
> +

I fixed it all and merged into clk-next.

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