tpmdd-devel Archive on lore.kernel.org
 help / color / Atom feed
From: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Laurent Bigonville <bigon-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: tpm device not showing up in /dev anymore
Date: Wed, 6 Sep 2017 07:05:55 +0300
Message-ID: <20170906040555.fqedhmo5277sd6fq@linux.intel.com> (raw)
In-Reply-To: <0d9be244-ace0-030d-6ff9-c4e94c63b7e9-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>

On Fri, Sep 01, 2017 at 02:10:18PM +0200, Laurent Bigonville wrote:
> Le 31/08/17 à 18:40, Jerry Snitselaar a écrit :
> > On Thu Aug 31 17, Alexander.Steffen-d0qZbvYSIPpWk0Htik3J/w@public.gmane.org wrote:
> > > > Le 29/08/17 à 18:35, Laurent Bigonville a écrit :
> > > > > Le 29/08/17 à 18:00, Alexander.Steffen-d0qZbvYSIPpWk0Htik3J/w@public.gmane.org a écrit :
> > > > >>> An idea how to troubleshoot this?
> > > > >> Can you run git bisect on the changes between 4.11 and 4.12, so that
> > > > >> we find the offending commit? It is probably sufficient to limit the
> > > > >> search to commits that touch something in drivers/char/tpm.
> > > > >
> > > > > I'll try and keep you posted.
> > > > 
> > > > OK I've been able to bisect the problem and the bad commit is:
> > > > 
> > > > e6aef069b6e97790cb127d5eeb86ae9ff0b7b0e3 is the first bad commit
> > > > commit e6aef069b6e97790cb127d5eeb86ae9ff0b7b0e3
> > > > Author: Jerry Snitselaar <jsnitsel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> > > > Date:   Mon Mar 27 08:46:04 2017 -0700
> > > > 
> > > >      tpm_tis: convert to using locality callbacks
> > > > 
> > > >      This patch converts tpm_tis to use of the new tpm class ops
> > > >      request_locality, and relinquish_locality.
> > > > 
> > > >      With the move to using the callbacks, release_locality is
> > > > changed so
> > > >      that we now release the locality even if there is no
> > > > request pending.
> > > > 
> > > >      This required some changes to the tpm_tis_core_init code path to
> > > >      make sure locality is requested when needed:
> > > > 
> > > >        - tpm2_probe code path will end up calling
> > > > request/release through
> > > >          callbacks, so request_locality prior to tpm2_probe not needed.
> > > > 
> > > >        - probe_itpm makes calls to tpm_tis_send_data which no
> > > > longer calls
> > > >          request_locality, so add request_locality prior to
> > > > tpm_tis_send_data
> > > >          calls. Also drop release_locality call in middleof
> > > > probe_itpm, and
> > > >          keep locality until release_locality called at end of
> > > > probe_itpm.
> > > > 
> > > >      Cc: Peter Huewe <peterhuewe-Mmb7MZpHnFY@public.gmane.org>
> > > >      Cc: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> > > >      Cc: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
> > > >      Cc: Marcel Selhorst <tpmdd-yWjUBOtONefk1uMJSBkQmQ@public.gmane.org>
> > > >      Signed-off-by: Jerry Snitselaar <jsnitsel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> > > >      Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1560@public.gmane.orgtel.com>
> > > >      Tested-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563N0uC3ymp8PA@public.gmane.orgl.com>
> > > >      Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > > > 
> > > > :040000 040000 70234365da69959d47076ebb40c8d17f520c3e44
> > > > 72f21b446e45ea1003de75902b0553deb99157fd M    drivers
> > > > 
> > > 
> > > I've looked again at the code in question, but could not find
> > > anything that is obviously wrong there. Locality is now
> > > requested/released at slightly different points in the process than
> > > before, but that's it. It does not seem to cause problems with the
> > > majority of TPMs, since you are the first to report any, so maybe it
> > > is a quirk that only affects this device.
> > > 
> > > Perhaps Jerry can help, since this is his change?
> > > 
> > > Alexander
> > 
> > Getting some caffeine in me, and starting to take a look. Adding
> > Jarkko as well since this might involve the general locality changes.
> > 
> > Laurent, if I send you a patch with some debugging code added, would
> > you be able to run it on that system? I wasn't running into issues
> > on the system I had with a 1.2 device, but I no longer have access
> > to it. I'll see if I can find one in our labs and reproduce it there.
> 
> Yes I should be able to do that

Any findings?

/Jarkko

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot

  parent reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-28 11:28 Laurent Bigonville
     [not found] ` <f9526f55-df96-64fc-a4d6-877ce04e7156-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-08-29 16:00   ` Alexander.Steffen-d0qZbvYSIPpWk0Htik3J/w
     [not found]     ` <dcad0104c46d4d5f88e642862bdb42c2-nFblLGNE8XKJSz+rYg/bSJowlv4uC7bZ@public.gmane.org>
2017-08-29 16:35       ` Laurent Bigonville
     [not found]         ` <47c4300b-8701-79a6-1c58-3a5853f4c5e3-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-08-29 17:39           ` Peter Huewe
2017-08-29 18:55           ` Laurent Bigonville
     [not found]             ` <595efb25-8d87-f39d-037f-9c9a98462339-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-08-31 12:10               ` Alexander.Steffen-d0qZbvYSIPpWk0Htik3J/w
     [not found]                 ` <857106e4bb864bb8a68b1381fffc8f50-nFblLGNE8XKJSz+rYg/bSJowlv4uC7bZ@public.gmane.org>
2017-08-31 16:40                   ` Jerry Snitselaar
2017-09-01 12:10                     ` Laurent Bigonville
     [not found]                       ` <0d9be244-ace0-030d-6ff9-c4e94c63b7e9-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-09-06  4:05                         ` Jarkko Sakkinen [this message]
     [not found]                           ` <20170906040555.fqedhmo5277sd6fq-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-10-14  8:13                             ` Jerry Snitselaar
2017-10-21  8:53                               ` Laurent Bigonville
     [not found]                                 ` <b63b765d-2477-d9fe-9d80-c2ea7e582bce-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-10-23 13:23                                   ` Jarkko Sakkinen
     [not found]                                     ` <20171023132346.jbqgokwv3ah2oqjo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-10-23 13:45                                       ` Jerry Snitselaar
2017-10-23 13:48                                         ` Laurent Bigonville
2017-10-24 13:51                                         ` Jarkko Sakkinen
     [not found]                                           ` <20171024135123.uqail7olnespun4k-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-10-24 14:57                                             ` Jerry Snitselaar
2017-10-24 16:07                                               ` Jarkko Sakkinen
     [not found]                                                 ` <20171024160725.r6kj452jdzpkbb6o-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-11-09  0:04                                                   ` Laurent Bigonville
     [not found]                                                     ` <8f4df9a9-c8cd-832f-4c3f-5305fabab7a8-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-11-09 19:58                                                       ` Laurent Bigonville
     [not found]                                                         ` <0a6e4771-f871-b3ca-b5b0-26dbd9efa8b1-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2017-11-09 23:50                                                           ` Jerry Snitselaar
     [not found]                                                             ` <20171109235005.pmklfw6zkjirahfa-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2017-11-10  2:19                                                               ` Jerry Snitselaar
2017-10-25  8:04                                             ` Laurent Bigonville
2017-09-06  5:09 Jerry Snitselaar

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170906040555.fqedhmo5277sd6fq@linux.intel.com \
    --to=jarkko.sakkinen-vuqaysv1563yd54fqh9/ca@public.gmane.org \
    --cc=bigon-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org \
    --cc=tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

tpmdd-devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/tpmdd-devel/0 tpmdd-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 tpmdd-devel tpmdd-devel/ https://lore.kernel.org/tpmdd-devel \
		tpmdd-devel@lists.sourceforge.net tpmdd-devel@archiver.kernel.org
	public-inbox-index tpmdd-devel


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/net.sourceforge.lists.tpmdd-devel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox