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Jan Dabros 17ba1e87fc i2c: designware: Fix improper usage of readl
Kernel test robot reported incorrect type in argument 1 of readl(), but
more importantly it brought attention that MMIO accessor shouldn't be
used in this case, since req->hdr.status is part of a command-response
buffer in system memory.

Since its value may be altered by PSP outside of the scope of current
thread (somehow similar to IRQ handler case), we need to use
READ_ONCE() to ensure compiler won't optimize this call.

Fix also 'status' variable type to reflect that corresponding field in
command-response buffer is platform-independent u32.

Fixes: 78d5e9e299 ("i2c: designware: Add AMD PSP I2C bus support")
Signed-off-by: Jan Dabros <jsd@semihalf.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-03-01 16:12:42 +01:00
arch - Fix the ptrace regset xfpregs_set() callback to behave according to the ABI 2022-02-20 12:46:21 -08:00
block block/wbt: fix negative inflight counter when remove scsi device 2022-02-17 07:54:03 -07:00
certs certs: Fix build error when CONFIG_MODULE_SIG_KEY is empty 2022-01-23 00:08:44 +09:00
crypto crypto: af_alg - get rid of alg_memory_allocated 2022-02-15 14:29:04 +00:00
Documentation dt-bindings: i2c: microchip,corei2c: Fix indentation of compatible items 2022-03-01 16:02:28 +01:00
drivers i2c: designware: Fix improper usage of readl 2022-03-01 16:12:42 +01:00
fs fs.mount_setattr.v5.17-rc4 2022-02-20 11:01:47 -08:00
include Merge tag 'irq-api-2022-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into i2c/for-mergewindow 2022-02-23 14:14:15 +01:00
init lib/stackdepot: allow optional init and stack_table allocation by kvmalloc() 2022-01-22 08:33:37 +02:00
ipc ipc/sem: do not sleep with a spin lock held 2022-02-04 09:25:05 -08:00
kernel genirq: Provide generic_handle_irq_safe() 2022-02-21 11:31:06 +01:00
lib lib/crypto: blake2s: avoid indirect calls to compression function for Clang CFI 2022-02-04 19:22:32 +01:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm: don't try to NUMA-migrate COW pages that have other uses 2022-02-17 08:57:47 -08:00
net ipv6: fix data-race in fib6_info_hw_flags_set / fib6_purge_rt 2022-02-17 09:48:24 -08:00
samples samples/seccomp: Adjust sample to also provide kill option 2022-02-10 19:09:12 -08:00
scripts kconfig: fix failing to generate auto.conf 2022-02-12 23:24:19 +09:00
security integrity-v5-17-fix 2022-02-07 09:55:14 -08:00
sound ASoC: intel: skylake: Set max DMA segment size 2022-02-17 09:39:44 +01:00
tools fs.mount_setattr.v5.17-rc4 2022-02-20 11:01:47 -08:00
usr kbuild: remove include/linux/cyclades.h from header file check 2022-01-27 08:51:08 +01:00
virt Two larger x86 series: 2022-01-28 19:00:26 +02:00
.clang-format genirq/msi: Make interrupt allocation less convoluted 2021-12-16 22:22:20 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: update Christian Brauner's email address 2022-02-01 11:21:31 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Removing Ohad from remoteproc/rpmsg maintenance 2021-12-08 10:09:40 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge tag 'irq-api-2022-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into i2c/for-mergewindow 2022-02-23 14:14:15 +01:00
Makefile Linux 5.17-rc5 2022-02-20 13:07:20 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.