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In some rare cases, driver may not have any available tx_retry_policies. In this case, the driver asks to mac80211 to stop sending data. However, it seems that a race is possible and a few frames can be sent to the driver. In this case, driver can't wait for free tx_retry_policies since wfx_tx() must be atomic. So, this patch fix this case by sending these frames with the special policy number 15. The firmware normally use policy 15 to send internal frames (PS-poll, beacons, etc...). So, it is not a so bad fallback. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-3-Jerome.Pouiller@silabs.com 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.
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.