From: Stefan Berger <stefanb@linux.ibm.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.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 08:10:32 -0500 [thread overview]
Message-ID: <da69e24d-ad5c-1e7b-9f02-a435872ad635@linux.ibm.com> (raw)
In-Reply-To: <20190208130227.GA16679@linux.intel.com>
On 2/8/19 8:02 AM, Jarkko Sakkinen wrote:
> On Fri, Feb 08, 2019 at 07:05:26AM -0500, Stefan Berger wrote:
>> See my comment on [PATCH v11 08/16]. It needs to be added in that patch
>> since otherwise rc holds a non-zero value on function exit, which is wrong
>> at that point.
> The snippet in question:
>
> rc = chip->ops->send(chip, buf, count);
> if (rc < 0) {
> if (rc != -EPIPE)
> dev_err(&chip->dev,
> "%s: tpm_send: error %d\n", __func__, rc);
> return rc;
> }
>
> if (chip->flags & TPM_CHIP_FLAG_IRQ)
> goto out_recv;
>
> 'send()' ought to return zero on success case.
>
> This is how the snippet was before applying any patches scheduled for
> v5.1:
>
> rc = chip->ops->send(chip, buf, count);
> if (rc < 0) {
> if (rc != -EPIPE)
> dev_err(&chip->dev,
> "%s: tpm_send: error %d\n", __func__, rc);
> return rc;
> }
>
> if (chip->flags & TPM_CHIP_FLAG_IRQ)
> goto out_recv;
>
> Does not compute.
tpm_tis_send_main returns 'len' and that's what we have here.
>
> /Jarkko
>
next prev parent reply other threads:[~2019-02-08 13:10 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
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 [this message]
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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