linux-kernel - Re: [PATCH] firmware: add a function to load optional firmware v2

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Message-ID: <87vae09jzd.fsf@kamboji.qca.qualcomm.com>
Date:   Tue, 13 Mar 2018 15:35:18 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Arend van Spriel <arend.vanspriel@...adcom.com>
Cc:     Andres Rodriguez <andresx7@...il.com>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Ilia Mirkin <imirkin@...m.mit.edu>, luciano.coelho@...el.com
Subject: Re: [PATCH] firmware: add a function to load optional firmware v2

Arend van Spriel <arend.vanspriel@...adcom.com> writes:

> On 3/11/2018 5:05 PM, Andres Rodriguez wrote:
>>> Your patch series then should also have the driver callers who you
>>> want to modify to use this new API. Collect from the 802.11 folks the
>>> other drivers which I think they wanted changed as well.
>>
>> Arend, Kalle, would love to hear your feedback.
>
> I am not sure if it was ath10k, but Kalle will surely know. The other
> driver firing a whole batch of firmware requests is iwlwifi. These
> basically try to get latest firmware version and if not there try an
> older one.

Oh yeah, ath10k definitely needs this! It tries different firmware API
versions from latest to older (firmware-6.bin, firmware-5.bin,
firmware-4.bin and so on) to find a compatible firmware and the error
messages from request_firmware() are constantly confusing the users, I
think the latest query about these errors from last week on IRC. So
having request_firmware_nowarn() (or similar) would help users a lot.

We tried to workaround this by using request_firmware_direct() (which
oddly doesn't print anything) but that caused issues with OpenWRT/LEDE:

https://git.kernel.org/linus/c0cc00f250e1

And iwlwifi has a similar problem, adding Luca to the loop.

-- 
Kalle Valo