Robin Gong 19a72e0cb0 firmware: imx: scu-irq: fix RCU complaint after M4 partition reset
Use blocking_notifier_chain instead of atomic_notifier_chain, otherwise
there will be RCU complaint, because unregister/register_virtio_device()
will issue mbox message.

mbox_send_message() is blocking again after received M4 partition reset.

Actually, no need atomic notifier for scu irq notification since this
notifier is called in worker instead of interrupt handler.

[  389.706645] i2c-rpmsg virtio0.rpmsg-i2c-channel.-1.2: i2c rpmsg driver is removed
[  389.767362] Wait for remote ready timeout, use first_notify.
[  389.774084] ------------[ cut here ]------------
[  389.778729] WARNING: CPU: 0 PID: 397 at kernel/rcu/tree_plugin.h:293 rcu_note_context_switch+0x34/0x338
[  389.788131] Modules linked in:
[  389.791195] CPU: 0 PID: 397 Comm: kworker/0:13 Not tainted 5.4.0-rc5-02977-g08f78722f07b #26
[  389.799633] Hardware name: Freescale i.MX8DXL MEK (DT)
[  389.805481] Workqueue: events imx_scu_irq_work_handler

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2023-08-11 22:14:02 +08:00
2023-07-03 18:48:38 -07:00
2023-07-09 09:50:42 -07:00
2023-07-01 09:24:31 -07:00
2023-07-03 18:43:10 -07:00
2023-07-09 10:24:22 -07:00
2023-07-07 09:55:31 -07:00
2023-07-07 15:40:17 -07:00
2023-07-03 15:32:22 -07:00
2022-09-28 09:02:20 +02:00
2023-06-26 16:43:54 -07:00
2022-10-10 12:00:45 -07:00
2023-07-09 10:29:53 -07:00
2023-07-09 13:53:13 -07:00

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.
Description
Linux kernel stable tree
Readme 6.1 GiB
Languages
C 97.5%
Assembly 1%
Shell 0.6%
Python 0.3%
Makefile 0.3%