[PATCH v2 00/11] Fix broken usage of driver_override (and kfree of static memory)

From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Stuart Yoder <stuyoder@gmail.com>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Abel Vesa <abel.vesa@nxp.com>, Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Vineeth Vijayan <vneethv@linux.ibm.com>,
	Peter Oberparleiter <oberpar@linux.ibm.com>,
	Heiko Carstens <hca@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Sven Schnelle <svens@linux.ibm.com>,
	Andy Gross <agross@kernel.org>,
	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
	Mark Brown <broonie@kernel.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	NXP Linux Team <linux-imx@nxp.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
	linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org,
	linux-spi@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Subject: [PATCH v2 00/11] Fix broken usage of driver_override (and kfree of static memory)
Date: Wed, 23 Feb 2022 20:12:59 +0100	[thread overview]
Message-ID: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> (raw)

Hi,

This is a continuation of my old patchset from 2019. [1]
Back then, few drivers set driver_override wrong. I fixed Exynos
in a different way after discussions. QCOM NGD was not fixed
and a new user appeared - IMX SCU.

It seems "char *" in driver_override looks too consty, so we
tend to make a mistake of storing there string literals.

Changes of latest since v1 (not the old 2019 solution):
=======================================================
https://lore.kernel.org/all/708eabb1-7b35-d525-d4c3-451d4a3de84f@rasmusvillemoes.dk/
1. Add helper for setting driver_override.
2. Use the helper.

Dependencies (and stable):
==========================
1. All patches, including last three fixes, depend on first patch
   introducing the helper.
2. The last three commits - fixes - are probably not backportable
   directly, because of this dependency. I don't know how to express
   it here, since stable-kernel-rules.rst mentions only commits as
   possible dependencies.

[1] https://lore.kernel.org/all/1550484960-2392-3-git-send-email-krzk@kernel.org/

Best regards,
Krzysztof

Krzysztof Kozlowski (11):
  driver: platform: add and use helper for safer setting of
    driver_override
  amba: use helper for safer setting of driver_override
  fsl-mc: use helper for safer setting of driver_override
  hv: vmbus: use helper for safer setting of driver_override
  pci: use helper for safer setting of driver_override
  s390: cio: use helper for safer setting of driver_override
  spi: use helper for safer setting of driver_override
  vdpa: use helper for safer setting of driver_override
  clk: imx: scu: fix kfree() of static memory on setting driver_override
  slimbus: qcom-ngd: fix kfree() of static memory on setting
    driver_override
  rpmsg: fix kfree() of static memory on setting driver_override

 drivers/amba/bus.c              | 24 +++---------------
 drivers/base/driver.c           | 44 +++++++++++++++++++++++++++++++++
 drivers/base/platform.c         | 24 +++---------------
 drivers/bus/fsl-mc/fsl-mc-bus.c | 22 +++--------------
 drivers/clk/imx/clk-scu.c       |  7 +++++-
 drivers/hv/vmbus_drv.c          | 24 +++---------------
 drivers/pci/pci-sysfs.c         | 24 +++---------------
 drivers/rpmsg/rpmsg_internal.h  | 13 ++++++++--
 drivers/rpmsg/rpmsg_ns.c        | 14 +++++++++--
 drivers/s390/cio/css.c          | 24 +++---------------
 drivers/slimbus/qcom-ngd-ctrl.c | 12 ++++++++-
 drivers/spi/spi.c               | 20 +++------------
 drivers/vdpa/vdpa.c             | 25 +++----------------
 include/linux/device/driver.h   |  1 +
 include/linux/platform_device.h |  6 ++++-
 include/linux/spi/spi.h         |  2 +-
 16 files changed, 123 insertions(+), 163 deletions(-)

-- 
2.32.0