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Date:   Tue, 4 Feb 2020 09:14:35 +0100
From:   Daniel Wagner <wagi@monom.org>
To:     JH <jupiter.hce@gmail.com>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        connman <connman@lists.01.org>
Subject: Re: Failed to can wifi Invalid Sched_scan parameters
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Hi JH,

On Tue, Feb 04, 2020 at 04:00:54PM +1100, JH wrote:
> [23703.958751] ieee80211 phy0: mwifiex_cfg80211_sched_scan_start :
> Invalid Sched_scan parameters
> 
> Where is the WiFi driver? Please let me know if you need more debug information.

linux/drivers/net/wireless/marvell/mwifiex

> > I am running kernel 4.19.75 on iMX6, the WiFi was working most of
> > time, but from time to time, the connman could not get WiFi be
> > connected due to following error:
> >
> > [23703.958751] ieee80211 phy0: mwifiex_cfg80211_sched_scan_start :
> > Invalid Sched_scan parameters
> >
> > What does that error means, in which circumstance it occurred? How can
> > we prevent it?

The 'Invalid Sched_scan parameters' indicates, wpa_supplicant is
providing the wrong parameters. Best thing is to monitor between
wpa_supplicant and kernel the netlink messages. iwmon is an excellent
tool for this.

Thanks,
Daniel