netdev - Re: [PATCH] ath9k: Check for errors when reading SREV register

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Message-ID: <CAKR_QVKWbrx2EmcaCBhyuaYRd+T3pFW0i2jVcDZG6=wee=DaMA@mail.gmail.com>
Date:   Wed, 20 Mar 2019 00:38:46 +0100
From:   Tom Psyborg <pozega.tomislav@...il.com>
To:     Tim Schumacher <timschumi@....de>
Cc:     QCA ath9k Development <ath9k-devel@....qualcomm.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ath9k: Check for errors when reading SREV register

On 19/03/2019, Tim Schumacher <timschumi@....de> wrote:
>
> The case in where the revision succeeded to read, but it simply
> isn't supported by the driver, is untouched and it still prints
> the original message.
>

In that case this change is fine.

> I don't know why it fails to read the SREV register in my specific
> case (I tracked it down to a WMI command timeout, which seems to
> only happen on a Raspberry Pi 3), but having the SREV error message
> (which points to the actual issue) instead of the false-positive
> "Rev not supported" message would have saved me quite some time that
> I spent with debugging the issue, searching for the source of the
> wrong value.
>

Did you try some other device than RPI3 ? I've noticed that on router
and laptop while doing some htc fw builds.