Re: [PATCH v1 3/3] net: mdio-mux: Handle -EPROBE_DEFER correctly

[Andrew Lunn]

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@xxxxxxxxxxxxxx/#t
> Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew