linux-kernel - Re: [v4.0][v4.1][v4.2][Regression] tpm: fix raciness of PPI interface lookup

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Message-ID: <20150915105332.GA18109@intel.com>
Date:	Tue, 15 Sep 2015 13:53:32 +0300
From:	Jarkko Sakkinen <jarkko.sakkinen@...el.com>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
Cc:	jarkko.sakkinen@...ux.intel.com,
	jason.gunthorpe@...idianresearch.com, stefanb@...ux.vnet.ibm.com,
	Scot Doyle <lkml14@...tdoyle.com>, peterhuewe@....de,
	tpmdd@...horst.net, tpmdd-devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [v4.0][v4.1][v4.2][Regression] tpm: fix raciness of PPI
 interface lookup

Hi

Sorry for the late reply. Looking into this now and sending feedback
later today.

/Jarkko

On Mon, Sep 14, 2015 at 05:36:07PM -0400, Joseph Salisbury wrote:
> Hi Jarkko,
> 
> A kernel bug report was opened against Ubuntu [0] and in bugzilla[1].  A
> kernel bisect was performed, and it identified the following commit as
> the first bad commit:
> 
> commit 0dc553652102c55a43eb1ab52e2049e478469f53
> Author: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Date:   Fri Dec 12 11:46:35 2014 -0800
> 
>     tpm: fix raciness of PPI interface lookup
> 
> 
> The regression was introduced as of v4.0-rc1.
> 
> I was hoping to get your feedback, since you are the patch author.  Do
> you think gathering any additional data will help diagnose this issue,
> or would it be best to submit a revert request?  An issue with the
> revert request is that it would also require reverting several other
> commits that came after this commit or a backport of the revert.
>     
> 
> Thanks,
>     
> Joe
> 
> [0] http://pad.lv/1491467
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=53071
> 
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