linux-kernel - Re: [Patch v8 1/4] memory: tegra: Add memory controller channels support

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Date:   Mon, 25 Apr 2022 22:25:40 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Ashish Mhetre <amhetre@...dia.com>, krzysztof.kozlowski@...aro.org,
        thierry.reding@...il.com, jonathanh@...dia.com, digetx@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v8 1/4] memory: tegra: Add memory controller channels
 support

On 4/25/22 10:50, Ashish Mhetre wrote:
> +static int tegra186_mc_map_regs(struct tegra_mc *mc)
> +{
> +	struct platform_device *pdev = to_platform_device(mc->dev);
> +	int i;
> +
> +	mc->bcast_ch_regs = devm_platform_ioremap_resource_byname(pdev, "broadcast");
> +	if (IS_ERR(mc->bcast_ch_regs)) {
> +		if (PTR_ERR(mc->bcast_ch_regs) == -EINVAL) {
> +			dev_warn(&pdev->dev, "Broadcast channel is missing, please update your device-tree\n");
> +			mc->bcast_ch_regs = NULL;
> +			return 0;
> +		}
> +		return PTR_ERR(mc->bcast_ch_regs);
> +	}
> +
> +	mc->ch_regs = devm_kcalloc(mc->dev, mc->soc->num_channels,
> +				   sizeof(void __iomem *), GFP_KERNEL);

You should use sizeof(*mc->ch_regs) in general to prevent mistakes.

> +	if (!mc->ch_regs)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < mc->soc->num_channels; i++) {
> +		char name[5];
> +
> +		snprintf(name, sizeof(name), "ch%u", i);

The type of "i" variable is int, change it to unsigned int.

With that:

Reviewed-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>