linux-kernel - RE: [v4] wlcore: add missing nvs file name info for wilink8

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Date:   Mon, 7 Aug 2017 07:31:28 +0000
From:   "Reizer, Eyal" <eyalr@...com>
To:     Julian Calaby <julian.calaby@...il.com>
CC:     Kalle Valo <kvalo@...eaurora.org>,
        ",Tony Lindgren" <tony@...mide.com>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "sebastian.reichel@...labora.co.uk" 
        <sebastian.reichel@...labora.co.uk>
Subject: RE: [v4] wlcore: add missing nvs file name info for wilink8



> -----Original Message-----
> From: Julian Calaby [mailto:julian.calaby@...il.com]
> Sent: Saturday, August 5, 2017 8:51 AM
> To: Reizer, Eyal
> Cc: Kalle Valo; ,Tony Lindgren; linux-wireless@...r.kernel.org; linux-
> kernel@...r.kernel.org; sebastian.reichel@...labora.co.uk
> Subject: Re: [v4] wlcore: add missing nvs file name info for wilink8
> 
> Hi Eyal,
> 
> On Mon, Jul 31, 2017 at 6:45 PM, Reizer, Eyal <eyalr@...com> wrote:
> > The following commits:
> > c815fde wlcore: spi: Populate config firmware data
> > d776fc8 wlcore: sdio: Populate config firmware data
> >
> > Populated the nvs entry for wilink6 and wilink7 only while it is
> > still needed for wilink8 as well.
> > This broke user space backward compatibility when upgrading from older
> > kernels, as the alternate mac address would not be read from the nvs that
> > is present in the file system (lib/firmware/ti-connectivity/wl1271-nvs.bin)
> > causing mac address change of the wlan interface.
> >
> > This patch fix this and update the structure field with the same default
> > nvs file name that has been used before.
> >
> > In addition, some distros hold a default wl1271-nvs.bin in the file
> > system with a bogus mac address (deadbeef...) that for a wl18xx device
> > also overrides the mac address that is stored inside the device.
> > Warn users about this bogus mac address and use a random mac instead
> >
> > Cc: stable <stable@...r.kernel.org>
> > Signed-off-by: Eyal Reizer <eyalr@...com>
> > ---
> >
> > diff --git a/drivers/net/wireless/ti/wlcore/main.c
> b/drivers/net/wireless/ti/wlcore/main.c
> > index 60aaa85..7ce4221 100644
> > --- a/drivers/net/wireless/ti/wlcore/main.c
> > +++ b/drivers/net/wireless/ti/wlcore/main.c
> > @@ -5961,6 +5961,22 @@ static void wl12xx_derive_mac_addresses(struct
> wl1271 *wl, u32 oui, u32 nic)
> >         if (nic + WLCORE_NUM_MAC_ADDRESSES - wl->num_mac_addr >
> 0xffffff)
> >                 wl1271_warning("NIC part of the MAC address wraps around!");
> >
> > +       if (oui == 0xdeadbe && nic == 0xef0000) {
> > +               wl1271_warning("Detected unconfigured mac address in nvs.\n"
> > +                               "Using a random TI mac address instead.\n"
> > +                               "in case of using a wl12xx device, your "
> > +                               "device performance may not be optimized.\n"
> > +                               "Please use the calibrator tool to configure "
> > +                               "your device.\n"
> > +                               "When using a wl18xx device the nvs file can "
> > +                               "be removed as a default mac address is "
> > +                               "stored internally.\n");
> > +
> > +               /* Use TI oui and a random nic */
> > +               oui = 0x080028;
> 
> Is there (or should there be) a constant for this?

Thanks for the comment. Submitting v5 fixing this.

Best Regards,
Eyal