From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Stefan Berger <stefanb@linux.ibm.com>
Cc: Alexander Steffen <Alexander.Steffen@infineon.com>,
linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
Peter Huewe <PeterHuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>,
Tomas Winkler <tomas.winkler@intel.com>,
Tadeusz Struk <tadeusz.struk@intel.com>,
Stefan Berger <stefanb@linux.vnet.ibm.com>,
Nayna Jain <nayna@linux.ibm.com>
Subject: Re: [PATCH v11 00/16] Remove nested TPM operations
Date: Fri, 8 Feb 2019 15:12:31 +0200 [thread overview]
Message-ID: <20190208131231.GB16679@linux.intel.com> (raw)
In-Reply-To: <8aecea14-cf0a-da6b-305c-c61ae03214be@linux.ibm.com>
On Fri, Feb 08, 2019 at 07:22:48AM -0500, Stefan Berger wrote:
> On 2/8/19 6:50 AM, Jarkko Sakkinen wrote:
> > On Thu, Feb 07, 2019 at 09:14:54PM -0500, Stefan Berger wrote:
> >
> > > chip->ops = NULL;
> > > up_write(&chip->ops_sem);
> > > }
> > > diff --git a/drivers/char/tpm/tpm-interface.c
> > > b/drivers/char/tpm/tpm-interface.c
> > > index 02e8cffd1163..fcd845ad8c3c 100644
> > > --- a/drivers/char/tpm/tpm-interface.c
> > > +++ b/drivers/char/tpm/tpm-interface.c
> > > @@ -124,6 +124,8 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> > > void *buf, size_t bufsiz)
> > > dev_err(&chip->dev, "tpm_transmit: tpm_recv: error %d\n", rc);
> > > } else if (len < TPM_HEADER_SIZE || len != be32_to_cpu(header->length))
> > > rc = -EFAULT;
> > > + else
> > > + rc = 0;
> > Why is this needed?
>
> Because it holds a non-zero value, which is wrong at this point. Below it
> is:
>
> return rc ? rc : len;
>
> It will always return that rc and never 'len'.
>
> It's not just needed for bisecting. I still need it with your latest tree.
> That's the only change I need with my current testing of tpm_vtpm_proxy, TIS
> + TPM 1.2 , TIS + TPM 2.0 , and CRB + TPM 2.0 (with QEMU :-) ).
The code is unchaged. If there was a regression that would have been
ages.
/Jarkko
next prev parent reply other threads:[~2019-02-08 13:12 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-05 22:47 [PATCH v11 00/16] Remove nested TPM operations Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 01/16] tpm: use tpm_buf in tpm_transmit_cmd() as the IO parameter Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 02/16] tpm: fix invalid return value in pubek_show() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 03/16] tpm: return 0 from pcrs_show() when tpm1_pcr_read() fails Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 04/16] tpm: print tpm2_commit_space() error inside tpm2_commit_space() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 05/16] tpm: declare struct tpm_header Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 06/16] tpm: access command header through struct in tpm_try_transmit() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 07/16] tpm: encapsulate tpm_dev_transmit() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 08/16] tpm: clean up tpm_try_transmit() error handling flow Jarkko Sakkinen
2019-02-07 23:36 ` Stefan Berger
2019-02-05 22:47 ` [PATCH v11 09/16] tpm: move tpm_validate_commmand() to tpm2-space.c Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 10/16] tpm: move TPM space code out of tpm_transmit() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 11/16] tpm: remove @space from tpm_transmit() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 12/16] tpm: use tpm_try_get_ops() in tpm-sysfs.c Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 13/16] tpm: remove TPM_TRANSMIT_UNLOCKED flag Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 14/16] tpm: introduce tpm_chip_start() and tpm_chip_stop() Jarkko Sakkinen
2019-02-05 22:47 ` [PATCH v11 15/16] tpm: take TPM chip power gating out of tpm_transmit() Jarkko Sakkinen
2019-02-07 23:32 ` Stefan Berger
2019-02-08 0:02 ` Jerry Snitselaar
2019-02-05 22:47 ` [PATCH v11 16/16] tpm: remove @flags from tpm_transmit() Jarkko Sakkinen
2019-02-06 12:06 ` [PATCH v11 00/16] Remove nested TPM operations Jarkko Sakkinen
2019-02-07 18:41 ` Alexander Steffen
2019-02-07 21:14 ` Stefan Berger
2019-02-07 21:29 ` Jarkko Sakkinen
2019-02-07 23:29 ` Stefan Berger
2019-02-08 0:33 ` Jarkko Sakkinen
2019-02-08 1:51 ` Stefan Berger
2019-02-08 2:14 ` Stefan Berger
2019-02-08 11:50 ` Jarkko Sakkinen
2019-02-08 12:22 ` Stefan Berger
2019-02-08 13:12 ` Jarkko Sakkinen [this message]
2019-02-08 13:28 ` Alexander Steffen
2019-02-08 14:09 ` Jarkko Sakkinen
2019-02-08 18:02 ` Alexander Steffen
2019-02-08 11:14 ` Jarkko Sakkinen
2019-02-08 12:05 ` Stefan Berger
2019-02-08 13:02 ` Jarkko Sakkinen
2019-02-08 13:10 ` Stefan Berger
2019-02-08 13:17 ` Jarkko Sakkinen
2019-02-08 13:33 ` Jarkko Sakkinen
2019-02-08 14:02 ` Stefan Berger
2019-02-08 14:08 ` Jarkko Sakkinen
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