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Re: [PATCH] tpm: don't destroy chip device prematurely

From Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Newsgroups linux.kernel
Subject Re: [PATCH] tpm: don't destroy chip device prematurely
Date 2016-10-03 18:10 +0200
Message-ID <sodYu-7ac-11@gated-at.bofh.it> (permalink)
References (2 earlier) <snMbU-5Br-19@gated-at.bofh.it> <snWuB-3G8-11@gated-at.bofh.it> <so5xT-Vq-1@gated-at.bofh.it> <so60V-1bh-11@gated-at.bofh.it> <soaQV-4YM-15@gated-at.bofh.it>
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On Mon, Oct 03, 2016 at 03:42:25PM +0300, Jarkko Sakkinen wrote:

> > I've looked to the registration code and it indeed has few more issues

?

> > Maybe TPM_CHIP_FLAG_REGISTERED can be used for sealing the access
> > to the device during deregistration, current usage is void.

This is done via chip->ops = NULL and the rwlock scheme.
 
> Good catch BTW. This flag has gone quite obsolote.

I think all the drivers have been updated at this point so we can
probably get rid of it entirely.

Jason

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Thread

[PATCH] tpm: don't destroy chip device prematurely Tomas Winkler <tomas.winkler@intel.com> - 2016-10-02 09:50 +0200
  Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-02 12:20 +0200
    Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-02 12:30 +0200
      Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-02 23:30 +0200
        RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-03 09:10 +0200
          RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-03 09:40 +0200
            Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-03 14:50 +0200
              Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-03 18:10 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-03 19:40 +0200
          Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-03 14:50 +0200
            Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-04 07:30 +0200
              Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-04 18:50 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-05 00:00 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-05 01:20 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-05 09:50 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-05 17:20 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-05 18:40 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-05 19:20 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-05 22:10 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-05 23:20 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-06 02:50 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-06 04:10 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-07 16:30 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-07 21:20 +0200
                RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-07 22:20 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-08 12:50 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-05 12:10 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-05 18:30 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-06 13:30 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-06 18:30 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-06 18:50 +0200
                Re: [PATCH] tpm: don't destroy chip device prematurely Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-10-05 12:10 +0200
          Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-03 18:10 +0200
            RE: [PATCH] tpm: don't destroy chip device prematurely "Winkler, Tomas" <tomas.winkler@intel.com> - 2016-10-03 19:20 +0200
              Re: [PATCH] tpm: don't destroy chip device prematurely Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-10-03 19:40 +0200

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