linux-kernel - Re: [tpmdd-devel] [PATCH v4 3/4] tpm: Allow TPM chip drivers to override reported command durations

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Message-ID: <CAO_EM_nY3X310xLtf6njsgmeaJuB2t=FcU9Gh=cMK0o55a=WXw@mail.gmail.com>
Date:	Wed, 8 Jun 2016 13:41:41 -0700
From:	Ed Swierk <eswierk@...portsystems.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	tpmdd-devel@...ts.sourceforge.net,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [tpmdd-devel] [PATCH v4 3/4] tpm: Allow TPM chip drivers to
 override reported command durations

On Wed, Jun 8, 2016 at 12:05 PM, Jason Gunthorpe
<jgunthorpe@...idianresearch.com> wrote:
> On Tue, Jun 07, 2016 at 05:45:39PM -0700, Ed Swierk wrote:
>> +     case 0x32041114: /* Atmel 3204 */
>> +             chip->vendor.timeout_a = TIS_SHORT_TIMEOUT * HZ / 1000;
>> +             chip->vendor.timeout_b = TIS_LONG_TIMEOUT * HZ / 1000;
>> +             chip->vendor.timeout_c = TIS_SHORT_TIMEOUT * HZ / 1000;
>> +             chip->vendor.timeout_d = TIS_SHORT_TIMEOUT * HZ / 1000;
>
> Shouldn't these use  msec_to_jiffies?

Indeed * HZ / 1000 can be one jiffy less than msec_to_jiffies(),
depending on HZ. I'll change it.

--Ed