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From:   Janusz Dziedzic <janusz.dziedzic@gmail.com>
Date:   Mon, 9 Dec 2019 20:48:49 +0100
Message-ID: <CAFED-jkz2U244BvqaHkMdj018fbTLOpz+ZK2j_1SrxaG4CvyNQ@mail.gmail.com>
Subject: iw set freq regression
To:     linux-wireless <linux-wireless@vger.kernel.org>
Cc:     Johannes Berg <johannes@sipsolutions.net>
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Sender: linux-wireless-owner@vger.kernel.org
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Hello,

For v4.9 this command works correctly:
./iw wlp1s0 set freq 5220 20 5220 0
./iw wlp1s0 set freq 5180 40 5190 0

With latest master this fail with err msg:
Usage:    ./iw [options] dev <devname> set freq <freq>
[NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
    dev <devname> set freq <control freq> [5|10|20|40|80|80+80|160]
[<center1_freq> [<center2_freq>]]
Options:
    --debug        enable netlink debugging

After bisection and revert this one, works as before:
4871fcf iw: parse_freqs: check how many center frequencies to expect

I know we don't need to set this all arguments and finally I can
change my script (don't set cf1/cf2).
Anyway report this.

BR
Janusz