linux-kernel - [PATCH v3 0/3] Use void pointers instead of char in I2C transfer APIs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191112203132.163306-1-dmitry.torokhov@gmail.com>
Date:   Tue, 12 Nov 2019 12:31:29 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     linux-iio@...r.kernel.orgi, Luca Ceresoli <luca@...aceresoli.net>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hartmut Knaack <knaack.h@....de>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org
Subject: [PATCH v3 0/3] Use void pointers instead of char in I2C transfer APIs

While we indeed often deal with a stream of bytes when executing a
transfer, at the higher layers we usually work with more structured
data, and there is not really a reason to require casts to u8 * form the
callers. These series change I2C APIs to accept [const] void pointers,
and also adjust SMBUS implementation to use get/put_unaligned_16() and
memcpy() for moving data around.

Changes in v3:
- addressed Luca's comments
- added Jonathan's Acked-by
- split put_unaligned_le16 into a separate patch
- more call sites converted to get/put_unaligned_le16
- new patch using memcpy() for moving data around

Changes in v2:
- adjusted max1363 to the new i2c_master_send/recv signatures

Dmitry Torokhov (3):
  i2c: use void pointers for supplying data for reads and writes
  i2c: smbus: use get/put_unaligned_le16 when working with word data
  i2c: smbus: switch from loops to memcpy

 drivers/i2c/i2c-core-base.c  |  2 +-
 drivers/i2c/i2c-core-smbus.c | 40 +++++++++++++++---------------------
 drivers/iio/adc/max1363.c    | 14 +++++++------
 include/linux/i2c.h          | 28 +++++++++++++------------
 4 files changed, 41 insertions(+), 43 deletions(-)

-- 
2.24.0.rc1.363.gb1bccd3e3d-goog