Date:   Fri, 17 Mar 2023 13:51:15 +0200
From:   Vladimir Oltean <olteanv@gmail.com>
To:     =?utf-8?B?w4FsdmFybyBGZXJuw6FuZGV6?= Rojas <noltari@gmail.com>
Cc:     davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
        pabeni@redhat.com, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, f.fainelli@gmail.com,
        jonas.gorski@gmail.com, andrew@lunn.ch, hkallweit1@gmail.com,
        linux@armlinux.org.uk, netdev@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] net: dsa: b53: mmap: register MDIO Mux bus controller
Message-ID: <20230317115115.s32r52rz3svuj4ed@skbuf>
References: <20230317113427.302162-1-noltari@gmail.com>
 <20230317113427.302162-3-noltari@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20230317113427.302162-3-noltari@gmail.com>
Precedence: bulk

On Fri, Mar 17, 2023 at 12:34:26PM +0100, ?lvaro Fern?ndez Rojas wrote:
> b53 MMAP devices have a MDIO Mux bus controller that must be registered after
> properly initializing the switch. If the MDIO Mux controller is registered
> from a separate driver and the device has an external switch present, it will
> cause a race condition which will hang the device.

Could you describe the race in more details? Why does it hang the device?