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[ Upstream commit1f492eab67] The driver sends Ethernet Management Datagram (EMAD) packets to the device for configuration purposes and waits for up to 200ms for a reply. A request is retried up to 5 times. When the system is under heavy load, replies are not always processed in time and EMAD transactions fail. Make the process more robust to such delays by using exponential backoff. First wait for up to 200ms, then retransmit and wait for up to 400ms and so on. Fixes:caf7297e7a("mlxsw: core: Introduce support for asynchronous EMAD register access") Reported-by: Denis Yulevich <denisyu@nvidia.com> Tested-by: Denis Yulevich <denisyu@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
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.