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If the sbsa_gwdt is enabled by BIOS, the kernel set WDOG_HW_RUNNING bit and keep it alive before anyone else would open it. When system suspend, the sbsa_gwdt would not be disabled because WDOG_ACTIVE is not set. Then the sbsa_gwdt would reach timeout since no one touch it during system suspend. To solve this, just test WDOG_HW_RUNNING bit in suspend and disable the sbsa_gwdt if the bit is set, then reopen it accordingly in resume process. Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230301113702.76437-1-wangwensheng4@huawei.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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.