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

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Date:   Sun, 2 Oct 2016 13:24:55 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     tpmdd-devel@...ts.sourceforge.net,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tpm: don't destroy chip device prematurely

On Sun, Oct 02, 2016 at 01:17:55PM +0300, Jarkko Sakkinen wrote:
> On Sun, Oct 02, 2016 at 10:39:31AM +0300, Tomas Winkler wrote:
> > In tpm_del_char_device device_del is called
> > prior to tpm2_shutdown where it is still used.
> > 
> > Fortunately, so far chip->dev was used only for printouts
> > int tpm2_shutdown flow, hence system didn't crash. But with
> > the introduction of runtime power management it will result in
> > shutting down the parent device while it still in use.
> > 
> > Fixes: 20e0152393b41 ("tpm: fix crash in tpm_tis deinitialization")
> > Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> 
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>

Applied.

/Jarkko