linux-kernel - Re: [PATCH] wlcore: add missing nvs file name info for wilink8

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Date:   Wed, 5 Jul 2017 10:28:37 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Tony Lindgren <tony@...mide.com>
Cc:     "Reizer, Eyal" <eyalr@...com>, Kalle Valo <kvalo@...eaurora.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] wlcore: add missing nvs file name info for wilink8

Hi,

On Wed, Jul 05, 2017 at 01:06:54AM -0700, Tony Lindgren wrote:
> > > Not sure if this really is a regression as we've always had a bogus
> > > wl1271-nvs.bin in linux-firmware.git. Sure would be nice to fix it,
> > > but going back to using a generic wl1271-nvs.bin sure does not seem
> > > like a good long term fix to me :)
> > A lot of legacy here...
> > Wl1271-nvs has been used mainly with wilink6/7 and indeed was device specific
> > Holding calibration info etc.
> > When they started with wilink8 the device specific configuration that was 
> > Part of it has switched to wl18xx-conf.bin and using the wlaconf tool for setting it.
> > Also there is no calibration specific info per device with wilink8 so the wl18xx-conf.bin
> > The only thing left in wl1271-nvs.bin for wilink8 was the mac address override.
> 
> And the default wl1271-nvs.bin sets the mac address to a bogus deadbeef address,
> so it's wrong to use and totally broken for distros :(

So use something like the following pseudo-code?

if (fw->mac_address == deadbeef) {
    fw->mac_address = get_random_mac();
    dev_warn(dev, "Detected unconfigured wl1271-nvs.bin.\n"
        "Your device will run with limited performance.\n"
        "Please use ti-utils to configure your device.\n");
}

-- Sebastian

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