linux-kernel - Re: [v2] wlcore: add missing nvs file name info for wilink8

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Date:   Tue, 4 Jul 2017 01:19:18 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     "Reizer, Eyal" <eyalr@...com>
Cc:     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: [v2] wlcore: add missing nvs file name info for wilink8

* Reizer, Eyal <eyalr@...com> [170703 23:58]:
> When working with wl18xx the nvs file is used for defining an alternate
> mac address and override the default mac address that is stored inside
> the wl18xx chip.
> 
> 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 
> already 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.

I think more checks on the nvs file being used are needed to avoid other
nasty issues, see the comments I just made in the earlier version of this
patch.

Regards,

Tony