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Shiraz Saleem f0842bb3d3 RDMA/irdma: Fix data race on CQP request done 
KCSAN detects a data race on cqp_request->request_done memory location
which is accessed locklessly in irdma_handle_cqp_op while being
updated in irdma_cqp_ce_handler.

Annotate lockless intent with READ_ONCE/WRITE_ONCE to avoid any
compiler optimizations like load fusing and/or KCSAN warning.

[222808.417128] BUG: KCSAN: data-race in irdma_cqp_ce_handler [irdma] / irdma_wait_event [irdma]

[222808.417532] write to 0xffff8e44107019dc of 1 bytes by task 29658 on cpu 5:
[222808.417610]  irdma_cqp_ce_handler+0x21e/0x270 [irdma]
[222808.417725]  cqp_compl_worker+0x1b/0x20 [irdma]
[222808.417827]  process_one_work+0x4d1/0xa40
[222808.417835]  worker_thread+0x319/0x700
[222808.417842]  kthread+0x180/0x1b0
[222808.417852]  ret_from_fork+0x22/0x30

[222808.417918] read to 0xffff8e44107019dc of 1 bytes by task 29688 on cpu 1:
[222808.417995]  irdma_wait_event+0x1e2/0x2c0 [irdma]
[222808.418099]  irdma_handle_cqp_op+0xae/0x170 [irdma]
[222808.418202]  irdma_cqp_cq_destroy_cmd+0x70/0x90 [irdma]
[222808.418308]  irdma_puda_dele_rsrc+0x46d/0x4d0 [irdma]
[222808.418411]  irdma_rt_deinit_hw+0x179/0x1d0 [irdma]
[222808.418514]  irdma_ib_dealloc_device+0x11/0x40 [irdma]
[222808.418618]  ib_dealloc_device+0x2a/0x120 [ib_core]
[222808.418823]  __ib_unregister_device+0xde/0x100 [ib_core]
[222808.418981]  ib_unregister_device+0x22/0x40 [ib_core]
[222808.419142]  irdma_ib_unregister_device+0x70/0x90 [irdma]
[222808.419248]  i40iw_close+0x6f/0xc0 [irdma]
[222808.419352]  i40e_client_device_unregister+0x14a/0x180 [i40e]
[222808.419450]  i40iw_remove+0x21/0x30 [irdma]
[222808.419554]  auxiliary_bus_remove+0x31/0x50
[222808.419563]  device_remove+0x69/0xb0
[222808.419572]  device_release_driver_internal+0x293/0x360
[222808.419582]  driver_detach+0x7c/0xf0
[222808.419592]  bus_remove_driver+0x8c/0x150
[222808.419600]  driver_unregister+0x45/0x70
[222808.419610]  auxiliary_driver_unregister+0x16/0x30
[222808.419618]  irdma_exit_module+0x18/0x1e [irdma]
[222808.419733]  __do_sys_delete_module.constprop.0+0x1e2/0x310
[222808.419745]  __x64_sys_delete_module+0x1b/0x30
[222808.419755]  do_syscall_64+0x39/0x90
[222808.419763]  entry_SYSCALL_64_after_hwframe+0x63/0xcd

[222808.419829] value changed: 0x01 -> 0x03

Fixes: 915cc7ac0f ("RDMA/irdma: Add miscellaneous utility definitions")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Link: https://lore.kernel.org/r/20230711175253.1289-4-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
2023-07-17 08:02:00 +03:00
arch - Do FPU AP initialization on Xen PV too which got missed by the recent 2023-07-09 10:13:32 -07:00
block block-6.5-2023-07-03 2023-07-03 18:48:38 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto This update includes the following changes: 2023-06-30 21:27:13 -07:00
Documentation Fixes for pci_clean_master, error handling in driver inits, and various 2023-07-09 09:35:51 -07:00
drivers RDMA/irdma: Fix data race on CQP request done 2023-07-17 08:02:00 +03:00
fs Minor cleanups for 6.5: 2023-07-09 09:50:42 -07:00
include 16 hotfixes. Six are cc:stable and the remainder address post-6.4 issues. 2023-07-08 14:30:25 -07:00
init Kbuild updates for v6.5 2023-07-01 09:24:31 -07:00
io_uring io_uring-6.5-2023-07-03 2023-07-03 18:43:10 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel dma-mapping fixes for Linux 6.5 2023-07-09 10:24:22 -07:00
lib 16 hotfixes. Six are cc:stable and the remainder address post-6.4 issues. 2023-07-08 14:30:25 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm: lock newly mapped VMA with corrected ordering 2023-07-08 16:44:11 -07:00
net Including fixes from bluetooth, bpf and wireguard. 2023-07-05 15:44:45 -07:00
rust rust: error: impl Debug for Error with errname() integration 2023-06-13 01:24:42 +02:00
samples Including fixes from bluetooth, bpf and wireguard. 2023-07-05 15:44:45 -07:00
scripts A half-dozen late arriving docs patches. They are mostly fixes, but we 2023-07-06 22:15:38 -07:00
security + Bug Fixes 2023-07-07 09:55:31 -07:00
sound sound fixes for 6.5-rc1 2023-07-07 15:40:17 -07:00
tools perf tools changes and fixes for v6.5: 2nd batch 2023-07-08 10:21:51 -07:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt ARM64: 2023-07-03 15:32:22 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Revert ".gitignore: ignore *.cover and *.mbx" 2023-07-04 15:05:12 -07:00
.mailmap 16 hotfixes. Six are cc:stable and the remainder address post-6.4 issues. 2023-07-08 14:30:25 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS 2: Electric Boogaloo 2023-07-09 10:29:53 -07:00
Makefile Linux 6.5-rc1 2023-07-09 13:53:13 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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.