linux-kernel - [PATCH v4 0/5] i3c: introduce and use generic parity helper

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: <20250107090204.6593-1-wsa+renesas@sang-engineering.com>
Date: Tue,  7 Jan 2025 10:01:58 +0100
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-i3c@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.com>,
	linux-hwmon@...r.kernel.org,
	Przemysław Gaj <pgaj@...ence.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Yury Norov <yury.norov@...il.com>
Subject: [PATCH v4 0/5] i3c: introduce and use generic parity helper

Changes since v3:

* updated commit message of patch 4 to state that a bug gets fixed.

All acks from bitmap.h and HWMON maintainers are already included.

Old coverletter follows:

I am currently working on upstreaming another I3C controller driver. As
many others, it needs to ensure odd parity for a dynamically assigned
address. The BSP version of the driver implemented a custom parity
algorithm. Wondering why we don't have a generic helper for this in the
kernel, I found that many I3C controller drivers all implement their
version of handling parity.

So, I sent out an RFC[1] moving the efficient implementation of the
SPD5118 driver to a generic location. The series was well received, but
the path for upstream was not clear. Because I need the implementation
for my I3C controller driver and I3C is a prominent user of this new
function, I got the idea of converting the existing I3C drivers and
resend the series, suggesting this all goes upstream via I3C.

A build-tested branch is here:

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/i3c/get_parity

Looking forward to comments...

[1] https://lore.kernel.org/all/20241214085833.8695-1-wsa+renesas@sang-engineering.com/

Wolfram Sang (5):
  bitops: add generic parity calculation for u8
  hwmon: (spd5118) Use generic parity calculation
  i3c: dw: use parity8 helper instead of open coding it
  i3c: mipi-i3c-hci: use parity8 helper instead of open coding it
  i3c: cdns: use parity8 helper instead of open coding it

 drivers/hwmon/spd5118.c                  |  8 +-----
 drivers/i3c/master/dw-i3c-master.c       | 14 +++--------
 drivers/i3c/master/i3c-master-cdns.c     |  3 +--
 drivers/i3c/master/mipi-i3c-hci/dat_v1.c | 11 +--------
 include/linux/bitops.h                   | 31 ++++++++++++++++++++++++
 5 files changed, 37 insertions(+), 30 deletions(-)

-- 
2.45.2