linux-kernel - Re: [Patch V2 2/4] tpm: tegra: Support SPI tpm wait state detect

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Message-ID: <Y+EmeP3ccaxxaBHX@orome>
Date:   Mon, 6 Feb 2023 17:10:32 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Paul Menzel <pmenzel@...gen.mpg.de>,
        Krishna Yarlagadda <kyarlagadda@...dia.com>,
        robh+dt@...nel.org, peterhuewe@....de, jgg@...pe.ca,
        jarkko@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-spi@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        jonathanh@...dia.com, skomatineni@...dia.com, ldewangan@...dia.com
Subject: Re: [Patch V2 2/4] tpm: tegra: Support SPI tpm wait state detect

On Mon, Feb 06, 2023 at 01:19:04PM +0000, Mark Brown wrote:
> On Mon, Feb 06, 2023 at 12:02:56PM +0100, Paul Menzel wrote:
> > Am 03.02.23 um 14:01 schrieb Krishna Yarlagadda:
> 
> > > +	/* If the SPI device has an IRQ then use that */
> > > +	if (dev->irq > 0)
> > > +		irq = dev->irq;
> > > +	else
> > > +		irq = -1;
> 
> > Use ternary operator?
> 
> >     irq = dev->irq > 0 ? dev->irq : -1;
> 
> No, please write the code using normal conditional instructions.  This
> isn't the IOCCC and the ternery operator is rarely a legibility aid.

Looks like the SPI core sets dev->irq = 0 for any error other than
-EPROBE_DEFER and the TPM TIS core checks for irq != 0 before trying to
setup that IRQ, so seems like we can just skip this altogether and pass
in dev->irq directly.

Thierry

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