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commitd616d36802upstream. mt7921 support following antenna combiantions only. * primary + secondary (2x2) * primary only (1x1) Since we cannot work on secondary antenna only, return error if the antenna bitmap is 0x2 in .set_antenna(). For example: iw phy0 set antenna 3 3 /* valid */ iw phy0 set antenna 1 1 /* valid */ iw phy0 set antenna 2 2 /* invalid */ Cc: stable@vger.kernel.org Fixes:e0f9fdda81("mt76: mt7921: add ieee80211_ops") Suggested-by: Knox Chiou <knoxchiou@google.com> Signed-off-by: Deren Wu <deren.wu@mediatek.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> 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.