Kernel sources for Moto G9 (Play) (Guamp)
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Milton Miller 9b5eec0099 net/ncsi: Avoid channel_monitor hrtimer deadlock
[ Upstream commit 03cb4d05b4ea9a3491674ca40952adb708d549fa ]

Calling ncsi_stop_channel_monitor from channel_monitor is a guaranteed
deadlock on SMP because stop calls del_timer_sync on the timer that
invoked channel_monitor as its timer function.

Recognise the inherent race of marking the monitor disabled before
deleting the timer by just returning if enable was cleared.  After
a timeout (the default case -- reset to START when response received)
just mark the monitor.enabled false.

If the channel has an entry on the channel_queue list, or if the
state is not ACTIVE or INACTIVE, then warn and mark the timer stopped
and don't restart, as the locking is broken somehow.

Fixes: 0795fb2021 ("net/ncsi: Stop monitor if channel times out or is inactive")
Signed-off-by: Milton Miller <miltonm@us.ibm.com>
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-04-14 08:22:35 +02:00
arch ARM: dts: imx6: pbab01: Set vmmc supply for both SD interfaces 2021-04-14 08:22:35 +02:00
block block: Suppress uevent for hidden device when removed 2021-03-30 14:36:59 +02:00
certs certs: Fix blacklist flag type confusion 2021-03-04 09:39:44 +01:00
crypto crypto: tcrypt - avoid signed overflow in byte count 2021-03-07 12:18:58 +01:00
Documentation sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2021-03-07 12:19:01 +01:00
drivers cxgb4: avoid collecting SGE_QBASE regs during traffic 2021-04-14 08:22:35 +02:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs fs: direct-io: fix missing sdio->boundary 2021-04-14 08:22:32 +02:00
include sch_red: fix off-by-one checks in red_check_params() 2021-04-14 08:22:34 +02:00
init init/Kconfig: make COMPILE_TEST depend on HAS_IOMEM 2021-04-10 13:21:19 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:18:40 +02:00
kernel tracing: Fix stack trace event size 2021-04-07 12:48:49 +02:00
lib PCI: Fix pci_register_io_range() memory leak 2021-03-17 16:43:46 +01:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm: fix race by making init_zero_pfn() early_initcall 2021-04-07 12:48:50 +02:00
net net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-04-14 08:22:35 +02:00
samples samples: bpf: Fix lwt_len_hist reusing previous BPF map 2020-12-30 11:25:57 +01:00
scripts vmlinux.lds.h: Create section for protection against instrumentation 2021-03-24 11:07:31 +01:00
security Revert 95ebabde382c ("capabilities: Don't allow writing ambiguous v3 file capabilities") 2021-03-17 16:43:47 +01:00
sound ASoC: wm8960: Fix wrong bclk and lrclk with pll enabled for some chips 2021-04-14 08:22:34 +02:00
tools perf auxtrace: Fix auxtrace queue conflict 2021-03-30 14:37:02 +02:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: arm64: Fix exclusive limit for IPA size 2021-03-17 16:43:51 +01:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-09-26 18:01:31 +02:00
Makefile Linux 4.19.186 2021-04-10 13:21:19 +02:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.