From: Andrew Lunn <andrew@lunn.ch>
To: Saravana Kannan <saravanak@google.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Marc Zyngier <maz@kernel.org>,
Neil Armstrong <narmstrong@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
kernel-team@android.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 3/3] net: mdio-mux: Handle -EPROBE_DEFER correctly
Date: Sat, 7 Aug 2021 17:49:24 +0200 [thread overview]
Message-ID: <YQ6rhOq7/eBqxBYB@lunn.ch> (raw)
In-Reply-To: <20210804214333.927985-4-saravanak@google.com>
On Wed, Aug 04, 2021 at 02:43:32PM -0700, Saravana Kannan wrote:
> When registering mdiobus children, if we get an -EPROBE_DEFER, we shouldn't
> ignore it and continue registering the rest of the mdiobus children. This
> would permanently prevent the deferring child mdiobus from working instead
> of reattempting it in the future. So, if a child mdiobus needs to be
> reattempted in the future, defer the entire mdio-mux initialization.
>
> This fixes the issue where PHYs sitting under the mdio-mux aren't
> initialized correctly if the PHY's interrupt controller is not yet ready
> when the mdio-mux is being probed. Additional context in the link below.
>
> Link: https://lore.kernel.org/lkml/CAGETcx95kHrv8wA-O+-JtfH7H9biJEGJtijuPVN0V5dUKUAB3A@mail.gmail.com/#t
> Signed-off-by: Saravana Kannan <saravanak@google.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
next prev parent reply other threads:[~2021-08-07 15:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 21:43 [PATCH v1 0/3] Clean up and fix error handling in mdio_mux_init() Saravana Kannan
2021-08-04 21:43 ` [PATCH v1 1/3] net: mdio-mux: Delete unnecessary devm_kfree Saravana Kannan
2021-08-07 14:23 ` Andrew Lunn
2021-08-04 21:43 ` [PATCH v1 2/3] net: mdio-mux: Don't ignore memory allocation errors Saravana Kannan
2021-08-07 15:46 ` Andrew Lunn
2021-08-04 21:43 ` [PATCH v1 3/3] net: mdio-mux: Handle -EPROBE_DEFER correctly Saravana Kannan
2021-08-07 15:49 ` Andrew Lunn [this message]
2021-08-05 9:02 ` [PATCH v1 0/3] Clean up and fix error handling in mdio_mux_init() Marc Zyngier
2021-08-05 18:36 ` Kevin Hilman
2021-08-05 18:37 ` Kevin Hilman
2021-08-05 18:47 ` Saravana Kannan
2021-08-05 10:31 ` David Miller
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