linux-kernel - [PATCH v1 0/1] nvmem: Handle actual amount of data read/written by suppliers

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Message-ID: <20240219113149.2437990-1-joychakr@google.com>
Date: Mon, 19 Feb 2024 11:31:48 +0000
From: Joy Chakraborty <joychakr@...gle.com>
To: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
	Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, 
	NXP Linux Team <linux-imx@....com>, Vladimir Zapolskiy <vz@...ia.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>, 
	Jerome Brunet <jbrunet@...libre.com>, 
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>, 
	Claudiu Beznea <claudiu.beznea@...on.dev>, Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Heiko Stuebner <heiko@...ech.de>, Orson Zhai <orsonzhai@...il.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, Chunyan Zhang <zhang.lyra@...il.com>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Vincent Shih <vincent.sunplus@...il.com>, Chen-Yu Tsai <wens@...e.org>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>, 
	Rafal Milecki <rafal@...ecki.pl>, Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Michal Simek <michal.simek@....com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, asahi@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-amlogic@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
	linux-arm-msm@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
	linux-stm32@...md-mailman.stormreply.com, linux-sunxi@...ts.linux.dev, 
	Joy Chakraborty <joychakr@...gle.com>
Subject: [PATCH v1 0/1] nvmem: Handle actual amount of data read/written by suppliers

This Patch series stems from discussions in patchset,
"[PATCH v2] nvmem: rmem: Fix return value of rmem_read()"
(https://lore.kernel.org/all/20240206042408.224138-1-joychakr@google.com/).
Where we come across the fact that currently the nvmem suppliers do not
actually let the core know how much data has been actually read or written.
Instead they are expected to return 0 for success and the core assumes that
the amount of data written is equal to what the core has requested.

On addition this patchset will also add some guards and checks based on the
count of data returned by the nvmem supplier.
---
V1 Changes : Change read/write callback prototype to ssize_t and
supplier changes to accomodate the same with core checks and bounds.
---

Joy Chakraborty (1):
  nvmem: Change return type of reg read/write to ssize_t

 drivers/nvmem/apple-efuses.c        |  5 +-
 drivers/nvmem/bcm-ocotp.c           |  8 ++--
 drivers/nvmem/brcm_nvram.c          |  8 +++-
 drivers/nvmem/core.c                | 73 +++++++++++++----------------
 drivers/nvmem/imx-iim.c             |  4 +-
 drivers/nvmem/imx-ocotp-ele.c       |  4 +-
 drivers/nvmem/imx-ocotp-scu.c       |  8 ++--
 drivers/nvmem/imx-ocotp.c           |  6 +--
 drivers/nvmem/jz4780-efuse.c        |  5 +-
 drivers/nvmem/lan9662-otpc.c        |  8 ++--
 drivers/nvmem/layerscape-sfp.c      |  7 ++-
 drivers/nvmem/lpc18xx_eeprom.c      | 10 ++--
 drivers/nvmem/lpc18xx_otp.c         |  4 +-
 drivers/nvmem/meson-efuse.c         | 10 +++-
 drivers/nvmem/meson-mx-efuse.c      |  4 +-
 drivers/nvmem/microchip-otpc.c      |  4 +-
 drivers/nvmem/mtk-efuse.c           |  4 +-
 drivers/nvmem/mxs-ocotp.c           |  5 +-
 drivers/nvmem/nintendo-otp.c        |  4 +-
 drivers/nvmem/qcom-spmi-sdam.c      |  8 ++--
 drivers/nvmem/qfprom.c              | 10 ++--
 drivers/nvmem/qoriq-efuse.c         |  4 +-
 drivers/nvmem/rave-sp-eeprom.c      | 12 ++---
 drivers/nvmem/rmem.c                |  2 +-
 drivers/nvmem/rockchip-efuse.c      | 11 +++--
 drivers/nvmem/rockchip-otp.c        | 13 ++---
 drivers/nvmem/sc27xx-efuse.c        |  3 +-
 drivers/nvmem/sec-qfprom.c          |  4 +-
 drivers/nvmem/snvs_lpgpr.c          | 13 +++--
 drivers/nvmem/sprd-efuse.c          |  8 ++--
 drivers/nvmem/stm32-bsec-optee-ta.c |  8 ++--
 drivers/nvmem/stm32-bsec-optee-ta.h | 12 ++---
 drivers/nvmem/stm32-romem.c         | 16 +++----
 drivers/nvmem/sunplus-ocotp.c       |  4 +-
 drivers/nvmem/sunxi_sid.c           | 11 +++--
 drivers/nvmem/u-boot-env.c          |  4 +-
 drivers/nvmem/uniphier-efuse.c      |  4 +-
 drivers/nvmem/vf610-ocotp.c         |  5 +-
 drivers/nvmem/zynqmp_nvmem.c        |  2 +-
 include/linux/nvmem-provider.h      |  4 +-
 40 files changed, 180 insertions(+), 159 deletions(-)

-- 
2.44.0.rc0.258.g7320e95886-goog