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Chenguang Zhao 229cc10284 net/mlx5: Fix variable not being completed when function returns 
[ Upstream commit 0e2909c6be ]

When cmd_alloc_index(), fails cmd_work_handler() needs
to complete ent->slotted before returning early.
Otherwise the task which issued the command may hang:

   mlx5_core 0000:01:00.0: cmd_work_handler:877:(pid 3880418): failed to allocate command entry
   INFO: task kworker/13:2:4055883 blocked for more than 120 seconds.
         Not tainted 4.19.90-25.44.v2101.ky10.aarch64 #1
   "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
   kworker/13:2    D    0 4055883      2 0x00000228
   Workqueue: events mlx5e_tx_dim_work [mlx5_core]
   Call trace:
      __switch_to+0xe8/0x150
      __schedule+0x2a8/0x9b8
      schedule+0x2c/0x88
      schedule_timeout+0x204/0x478
      wait_for_common+0x154/0x250
      wait_for_completion+0x28/0x38
      cmd_exec+0x7a0/0xa00 [mlx5_core]
      mlx5_cmd_exec+0x54/0x80 [mlx5_core]
      mlx5_core_modify_cq+0x6c/0x80 [mlx5_core]
      mlx5_core_modify_cq_moderation+0xa0/0xb8 [mlx5_core]
      mlx5e_tx_dim_work+0x54/0x68 [mlx5_core]
      process_one_work+0x1b0/0x448
      worker_thread+0x54/0x468
      kthread+0x134/0x138
      ret_from_fork+0x10/0x18

Fixes: 485d65e135 ("net/mlx5: Add a timeout to acquire the command queue semaphore")
Signed-off-by: Chenguang Zhao <zhaochenguang@kylinos.cn>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Acked-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20250108030009.68520-1-zhaochenguang@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-17 13:36:15 +01:00
arch x86/mm/numa: Use NUMA_NO_NODE when calling memblock_set_node() 2025-01-17 13:36:14 +01:00
block block: avoid to reuse hctx not removed from cpuhp callback list 2025-01-02 10:32:11 +01:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto crypto: ecc - Prevent ecc_digits_from_bytes from reading too many bytes 2025-01-09 13:31:52 +01:00
Documentation dt-bindings: display: adi,adv7533: Drop single lane support 2025-01-09 13:32:08 +01:00
drivers net/mlx5: Fix variable not being completed when function returns 2025-01-17 13:36:15 +01:00
fs btrfs: avoid NULL pointer dereference if no valid extent tree 2025-01-17 13:36:12 +01:00
include tcp/dccp: allow a connection when sk_max_ack_backlog is zero 2025-01-17 13:36:12 +01:00
init Compiler Attributes: disable __counted_by for clang < 19.1.3 2024-12-09 10:32:46 +01:00
io_uring io_uring/sqpoll: fix sqpoll error handling races 2025-01-02 10:32:10 +01:00
ipc ipc: fix memleak if msg_init_ns failed in create_ipc_ns 2024-12-09 10:32:54 +01:00
kernel kcov: mark in_softirq_really() as __always_inline 2025-01-09 13:32:07 +01:00
lib seq_buf: Introduce DECLARE_SEQ_BUF and seq_buf_str() 2025-01-09 13:31:55 +01:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm memblock: use numa_valid_node() helper to check for invalid node ID 2025-01-17 13:36:09 +01:00
net sched: sch_cake: add bounds checks to host bulk flow fairness counts 2025-01-17 13:36:15 +01:00
rust rust: macros: fix documentation of the paste! macro 2024-12-09 10:32:25 +01:00
samples samples/bpf: Fix a resource leak 2024-12-14 20:00:03 +01:00
scripts scripts/sorttable: fix orc_sort_cmp() to maintain symmetry and transitivity 2025-01-09 13:32:07 +01:00
security selinux: ignore unknown extended permissions 2025-01-09 13:31:54 +01:00
sound ASoC: mediatek: disable buffer pre-allocation 2025-01-17 13:36:11 +01:00
tools memblock tests: fix implicit declaration of function 'numa_valid_node' 2025-01-17 13:36:14 +01:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt KVM: Use dedicated mutex to protect kvm_usage_count to avoid deadlock 2024-10-04 16:29:47 +02:00
.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 Remove *.orig pattern from .gitignore 2024-10-04 16:29:44 +02:00
.mailmap 20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues 2023-10-24 09:52:16 -10:00
.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 USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
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 membarrier: riscv: Add full memory barrier in switch_mm() 2024-09-12 11:11:45 +02:00
Makefile Linux 6.6.71 2025-01-10 14:31:36 +01:00
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.