linux-kernel - Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186 onward

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 19 Mar 2022 18:50:25 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ashish Mhetre <amhetre@...dia.com>,
        krzysztof.kozlowski@...onical.com, robh+dt@...nel.org,
        thierry.reding@...il.com, jonathanh@...dia.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186
 onward

16.03.2022 12:25, Ashish Mhetre пишет:
> +irqreturn_t tegra30_mc_handle_irq(int irq, void *data)
>  {
>  	struct tegra_mc *mc = data;
>  	unsigned long status;
> +	bool mc_has_channels;
>  	unsigned int bit;
> +	int channel;

unsigned int

> +	mc_has_channels = mc->soc->num_channels && mc->soc->get_int_channel;
> +	if (mc_has_channels) {
> +		int err;
> +
> +		err = mc->soc->get_int_channel(mc, &channel);
> +		if (err < 0)
> +			return IRQ_NONE;
> +
> +		/* mask all interrupts to avoid flooding */
> +		status = mc_ch_readl(mc, channel, MC_INTSTATUS) & mc->soc->intmask;
> +	} else {
> +		status = mc_readl(mc, MC_INTSTATUS) & mc->soc->intmask;
> +	}

So if mc_has_channels=false, while it should be true, then you're going
to handle interrupt incorrectly?