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297bdc540f
Insert a minimum 1 millisecond delay after writing to a register before reading from it. SIS and PQI registers that can be both written to and read from can return stale data if read from too soon after having been written to. There is no read/write ordering or hazard detection on the inbound path to the MSGU from the PCIe bus, therefore reads could pass writes. Link: https://lore.kernel.org/r/165730602555.177165.11181012469428348394.stgit@brunhilda Reviewed-by: Scott Teel <scott.teel@microchip.com> Signed-off-by: Mike McGowen <mike.mcgowen@microchip.com> Co-developed-by: Kevin Barnett <kevin.barnett@microchip.com> Signed-off-by: Kevin Barnett <kevin.barnett@microchip.com> Signed-off-by: Don Brace <don.brace@microchip.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.