linux-kernel - Re: [PATCH v5 2/3] tpm: enhance read_log_of() to support Physical TPM event log

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Message-ID: <20161124210637.6dspokalv7tcql26@intel.com>
Date:   Thu, 24 Nov 2016 23:06:37 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Nayna Jain <nayna@...ux.vnet.ibm.com>
Cc:     tpmdd-devel@...ts.sourceforge.net, peterhuewe@....de,
        tpmdd@...horst.net, jgunthorpe@...idianresearch.com,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/3] tpm: enhance read_log_of() to support Physical
 TPM event log

On Wed, Nov 23, 2016 at 12:27:36PM -0500, Nayna Jain wrote:
> -	memcpy(log->bios_event_log, __va(*basep), *sizep);
> +	if (of_property_match_string(np, "compatible", "IBM,vtpm") < 0)
> +		memcpy(chip->log.bios_event_log, __va(be64_to_cpup(basep)),
> +		       log_size);
> +	else
> +		memcpy(chip->log.bios_event_log, __va(*basep), log_size);


This does not look good. You should be able rearrange your code in a way
that you only have only one memcpy call.

/Jarkko