From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: "Winkler, Tomas" <tomas.winkler@intel.com>,
"tpmdd-devel@lists.sourceforge.net"
<tpmdd-devel@lists.sourceforge.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tpm: don't destroy chip device prematurely
Date: Thu, 6 Oct 2016 14:23:57 +0300 [thread overview]
Message-ID: <20161006112357.GA10533@intel.com> (raw)
In-Reply-To: <20161005162741.GA18636@obsidianresearch.com>
On Wed, Oct 05, 2016 at 10:27:41AM -0600, Jason Gunthorpe wrote:
> On Wed, Oct 05, 2016 at 01:02:34PM +0300, Jarkko Sakkinen wrote:
>
> > I'll repeat my question: what worse can happen than returning -EPIPE? I
> > though the whole rw lock scheme was introduced just for this purpose.
>
> I thought I explained this, if device_del is moved after ops = null
> then if sysfs looses the race it will oops the kernel. device_del hard
> fences sysfs.
Sorry, I missed that comment somehow. Looking at the code it is like
that.
I think that they should be fenced then for the sake of consistency.
I do not see why sysfs code is privileged not to do fencing while other
peers have to do it.
/Jarkko
next prev parent reply other threads:[~2016-10-06 11:23 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-02 7:39 [PATCH] tpm: don't destroy chip device prematurely Tomas Winkler
[not found] ` <1475393971-12715-1-git-send-email-tomas.winkler-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-02 10:17 ` Jarkko Sakkinen
[not found] ` <20161002101755.GA25844-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-02 10:24 ` Jarkko Sakkinen
[not found] ` <20161002102455.GA27464-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-02 21:21 ` Jason Gunthorpe
[not found] ` <20161002212126.GA25872-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-03 7:05 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F466B-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-03 7:38 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F46C1-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-03 12:42 ` Jarkko Sakkinen
2016-10-03 16:03 ` Jason Gunthorpe
[not found] ` <20161003160308.GA6801-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-03 17:30 ` Winkler, Tomas
2016-10-03 12:48 ` Jarkko Sakkinen
[not found] ` <20161003124836.GE9990-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-04 5:19 ` Jarkko Sakkinen
2016-10-04 16:47 ` Jason Gunthorpe
2016-10-04 21:55 ` Winkler, Tomas
2016-10-04 23:10 ` Jason Gunthorpe
[not found] ` <20161004231057.GA20062-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-05 7:48 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F5084-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-05 15:15 ` Jarkko Sakkinen
2016-10-05 16:37 ` Jason Gunthorpe
2016-10-05 17:11 ` Jason Gunthorpe
2016-10-05 20:09 ` Winkler, Tomas
2016-10-05 21:16 ` Jason Gunthorpe
2016-10-06 0:43 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F561B-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-06 2:07 ` Jason Gunthorpe
[not found] ` <20161006020748.GA17479-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-07 14:24 ` Winkler, Tomas
2016-10-07 19:17 ` Jason Gunthorpe
[not found] ` <20161007191724.GA28795-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-07 20:10 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F625A-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-08 10:47 ` Jarkko Sakkinen
2016-10-05 10:02 ` Jarkko Sakkinen
[not found] ` <20161005100234.GA20851-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-10-05 16:27 ` Jason Gunthorpe
2016-10-06 11:23 ` Jarkko Sakkinen [this message]
2016-10-06 16:22 ` Jason Gunthorpe
[not found] ` <20161006162245.GF1224-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-10-06 16:46 ` Jarkko Sakkinen
2016-10-05 10:09 ` Jarkko Sakkinen
2016-10-03 16:00 ` Jason Gunthorpe
2016-10-03 17:16 ` Winkler, Tomas
[not found] ` <5B8DA87D05A7694D9FA63FD143655C1B542F474C-Jy8z56yoSI8MvF1YICWikbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-10-03 17:30 ` Jason Gunthorpe
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