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08a5bdde38
Commit7b6ddeaf27("mac80211: use QoS NDP for AP probing") let STAs send QoS Null frames as PS triggers if the AP was a QoS STA. However, the mac80211 PS stack relies on an interface flag IEEE80211_STA_NULLFUNC_ACKED for determining trigger frame ACK, which was not being set for acked non-QoS Null frames. The effect is an inability to trigger hardware sleep via IEEE80211_CONF_PS since the QoS Null frame was seemingly never acked. This bug only applies to drivers which set both IEEE80211_HW_REPORTS_TX_ACK_STATUS and IEEE80211_HW_PS_NULLFUNC_STACK. Detect the acked QoS Null frame to restore STA power save. Fixes:7b6ddeaf27("mac80211: use QoS NDP for AP probing") Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com> Link: https://lore.kernel.org/r/20191119053538.25979-4-thomas@adapt-ip.com Signed-off-by: Johannes Berg <johannes.berg@intel.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.