From: "Winkler, Tomas" <tomas.winkler@intel.com>
To: Nayna Jain <nayna@linux.ibm.com>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nayna Jain <nayna@linux.vnet.ibm.com>,
"Usyskin, Alexander" <alexander.usyskin@intel.com>,
"Struk, Tadeusz" <tadeusz.struk@intel.com>,
"linux-integrity@vger.kernel.org"
<linux-integrity@vger.kernel.org>,
"linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v6 03/20] tpm: factor out tpm 1.x duration calculation to tpm1-cmd.c
Date: Wed, 17 Oct 2018 12:24:28 +0000 [thread overview]
Message-ID: <5B8DA87D05A7694D9FA63FD143655C1B9D9F4691@hasmsx109.ger.corp.intel.com> (raw)
In-Reply-To: <05fea3e6-91a3-b508-83c0-d8f06d6bbd5c@linux.ibm.com>
>
>
>
> On 10/17/2018 12:15 PM, Tomas Winkler wrote:
> > diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c
> > b/drivers/char/tpm/tpm_i2c_nuvoton.c
> > index caa86b19c76d..5d20e98b844f 100644
> > --- a/drivers/char/tpm/tpm_i2c_nuvoton.c
> > +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> > @@ -370,6 +370,7 @@ static int i2c_nuvoton_send(struct tpm_chip *chip,
> u8 *buf, size_t len)
> > struct i2c_client *client = to_i2c_client(dev);
> > u32 ordinal;
> > size_t count = 0;
> > + unsigned long duration;
> > int burst_count, bytes2write, retries, rc = -EIO;
> >
> > for (retries = 0; retries < TPM_RETRY; retries++) { @@ -455,12
> > +456,11 @@ static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf,
> size_t len)
> > return rc;
> > }
> > ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
> > - rc = i2c_nuvoton_wait_for_data_avail(chip,
> > - tpm_calc_ordinal_duration(chip,
> > - ordinal),
> > - &priv->read_queue);
> > + duration = tpm1_calc_ordinal_duration(chip, ordinal);
>
>
> This version of the patch didn't address my previous comment - "The original
> code in the nuvoton driver does not differentiate between TPM 1.2 and TPM
> 2.0 as it does in tpm_tis_core.c.
> Before making any changes, I would first fix it, so that it could easily be
> backported. Only then do the refactoring."
This patch doesn't change the original behavior, just change the name of the function, so there is no regression.
I would suggest there is another bug in those drivers/devices that is orthogonal to this refactoring and should not block this from merging.
According to what you say it can call just tpm_calc_oridnal_duration() instead of tpm1_calc_ordinal_duration(chip, ordinal),
but I prefer that someone that has those devices will do that change on top of this series as I cannot test it.
Thanks
Tomas
next prev parent reply other threads:[~2018-10-17 12:24 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-17 6:45 [PATCH v6 00/21] tpm: separate tpm 1.x and tpm 2.x commands Tomas Winkler
2018-10-17 6:45 ` [PATCH v6 01/20] tpm2: add new tpm2 commands according to TCG 1.36 Tomas Winkler
2018-10-17 6:45 ` [PATCH v6 02/20] tpm: sort objects in the Makefile Tomas Winkler
2018-10-17 6:45 ` [PATCH v6 03/20] tpm: factor out tpm 1.x duration calculation to tpm1-cmd.c Tomas Winkler
2018-10-17 11:54 ` Nayna Jain
2018-10-17 12:24 ` Winkler, Tomas [this message]
2018-10-17 15:07 ` Nayna Jain
2018-10-17 15:28 ` Winkler, Tomas
2018-10-17 6:45 ` [PATCH v6 04/20] tpm: add tpm_calc_ordinal_duration() wrapper Tomas Winkler
2018-10-17 6:45 ` [PATCH v6 05/20] tpm: factor out tpm_get_timeouts() Tomas Winkler
2018-10-17 6:45 ` [PATCH v6 06/20] tpm: move tpm1_pcr_extend to tpm1-cmd.c Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 07/20] tpm: move tpm_getcap " Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 08/20] tpm: factor out tpm1_get_random into tpm1-cmd.c Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 09/20] tpm: move tpm 1.x selftest code from tpm-interface.c tpm1-cmd.c Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 10/20] tpm: factor out tpm 1.x pm suspend flow into tpm1-cmd.c Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 11/20] tpm: factor out tpm_startup function Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 12/20] tpm: add tpm_auto_startup() into tpm-interface.c Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 13/20] tpm: tpm-interface.c drop unused macros Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 14/20] tpm: tpm-space.c remove unneeded semicolon Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 15/20] tpm: tpm1: rewrite tpm1_get_random() using tpm_buf structure Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 16/20] tpm1: implement tpm1_pcr_read_dev() " Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 17/20] tmp1: rename tpm1_pcr_read_dev to tpm1_pcr_read() Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 18/20] tpm1: reimplement SAVESTATE using tpm_buf Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 19/20] tpm1: reimplement tpm1_continue_selftest() " Tomas Winkler
2018-10-17 6:46 ` [PATCH v6 20/20] tpm: use u32 instead of int for PCR index Tomas Winkler
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