linux-kernel - Re: [Patch v7 1/4] memory: tegra: Add memory controller channels support

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Message-ID: <a4059c30-b660-cad4-4c5d-3b100ac164bf@collabora.com>
Date:   Fri, 15 Apr 2022 00:11:18 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Ashish Mhetre <amhetre@...dia.com>, digetx@...il.com,
        krzysztof.kozlowski@...aro.org, thierry.reding@...il.com,
        jonathanh@...dia.com, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, krzysztof.kozlowski+dt@...aro.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v7 1/4] memory: tegra: Add memory controller channels
 support

On 4/13/22 12:40, 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");
> +			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);
> +	if (!mc->ch_regs)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < mc->soc->num_channels; i++) {
> +		char name[4];
> +
> +		sprintf(name, "ch%u", i);

name[5], otherwise you corrupting stack. Use snprintf(name, sizeof(name)).