linux-kernel - Re: [Patch V3] memory: tegra: Add MC error logging on tegra186 onward

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Date:   Fri, 21 Jan 2022 15:31:06 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ashish Mhetre <amhetre@...dia.com>, thierry.reding@...il.com,
        jonathanh@...dia.com, linux-tegra@...r.kernel.org,
        krzysztof.kozlowski@...onical.com, linux-kernel@...r.kernel.org
Cc:     Snikam@...dia.com, vdumpa@...dia.com
Subject: Re: [Patch V3] memory: tegra: Add MC error logging on tegra186 onward

...
> @@ -529,12 +536,44 @@ static irqreturn_t tegra30_mc_handle_irq(int irq, void *data)
>  		u8 id, type;
>  		u32 value;
>  
> -		value = mc_readl(mc, MC_ERR_STATUS);
> +		switch (bit) {

Again, I see that the code wasn't tested :/ Shouldn't be too difficult
to create memory-read errors to check that at least basics work
properly. Please always test your changes next time.

So it must be "switch(BIT(bit))" here, please write it like this:

u32 intmask = BIT(bit);
...
	switch(intmask) {

> +		case MC_INT_DECERR_VPR:
> +			status_reg = MC_ERR_VPR_STATUS;
> +			addr_reg = MC_ERR_VPR_ADR;
> +			break;

Please add newline after every "break;" of every case. This will make
code easier to read a tad.

> +		case MC_INT_SECERR_SEC:
> +			status_reg = MC_ERR_SEC_STATUS;
> +			addr_reg = MC_ERR_SEC_ADR;
> +			break;
> +		case MC_INT_DECERR_MTS:
> +			status_reg = MC_ERR_MTS_STATUS;
> +			addr_reg = MC_ERR_MTS_ADR;
> +			break;
> +		case MC_INT_DECERR_GENERALIZED_CARVEOUT:
> +			status_reg = MC_ERR_GENERALIZED_CARVEOUT_STATUS;
> +			addr_reg = MC_ERR_GENERALIZED_CARVEOUT_ADR;
> +			break;
> +		case MC_INT_DECERR_ROUTE_SANITY:
> +			status_reg = MC_ERR_ROUTE_SANITY_STATUS;
> +			addr_reg = MC_ERR_ROUTE_SANITY_ADR;
> +			break;
> +		default:
> +			status_reg = MC_ERR_STATUS;
> +			addr_reg = MC_ERR_ADR;

Add newline here too.

> +			if (mc->soc->has_addr_hi_reg)
> +				addr_hi_reg = MC_ERR_ADR_HI;
> +			break;
> +		}
...
Note that you could use "git format-patch -v4 ..." instead of manually
changing the [PATCH] prefix.