linux-kernel - Re: [PATCH v2] tpm: tpm_ibm

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Message-ID: <20190708224304.GA25838@infradead.org>
Date:   Mon, 8 Jul 2019 15:43:04 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Nayna Jain <nayna@...ux.ibm.com>,
        linux-integrity@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, Jason Gunthorpe <jgg@...pe.ca>,
        Sachin Sant <sachinp@...ux.vnet.ibm.com>,
        George Wilson <gcwilson@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Suchanek <msuchanek@...e.de>,
        Peter Huewe <peterhuewe@....de>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH v2] tpm: tpm_ibm_vtpm: Fix unallocated banks

On Mon, Jul 08, 2019 at 06:24:04PM -0400, Mimi Zohar wrote:
> > static int tpm_get_pcr_allocation(struct tpm_chip *chip)
> > {
> > 	int rc;
> > 
> > 	rc = (chip->flags & TPM_CHIP_FLAG_TPM2) ?
> >      	     tpm2_get_pcr_allocation(chip) :
> >      	     tpm1_get_pcr_allocation(chip);
> 
> > 
> > 	return rc > 0 ? -ENODEV : rc;
> > }
> > 
> > This addresses the issue that Stefan also pointed out. You have to
> > deal with the TPM error codes.
> 
> Hm, in the past I was told by Christoph not to use the ternary
> operator.  Have things changed?  Other than removing the comment, the
> only other difference is the return.

In the end it is a matter of personal preference, but I find the
quote version above using the ternary horribly obsfucated.