linux-kernel - Re: [PATCH] tpm: fix unused-value issues in tpm_try

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Date:   Wed, 10 Oct 2018 08:06:38 -0600
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Tomas Winkler <tomas.winkler@...el.com>,
        Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tpm: fix unused-value issues in tpm_try_transmit

On Wed, Oct 10, 2018 at 03:38:17PM +0200, Gustavo A. R. Silva wrote:
> Currently, there are some values assigned to variable *rc*, which
> are never actually used in any computation, because such variable
> is updated at line 550, before they can be used:
> 
> 549out:
> 550        rc = tpm_go_idle(chip, flags);
> 551        if (rc)
> 552                goto out;
> 
> Fix this by removing such assignments. 

Should this be done by not quashing rc during the error unwind rather
than dropping the errors?

Jason