[U-Boot] [PATCH v4 1/5] net: mvpp2x: fix traffic stuck after PHY start error

[Joe Hershberger]

On Thu, Aug 15, 2019 at 5:09 PM <nhed+uboot at starry.com> wrote:
>
> From: Stefan Chulski <stefanc at marvell.com>
>
> Issue:
> - Network stuck if autonegotion fails.
>
> Issue root cause:
>
> - When autonegotiation fails during port open procedure, the packet
>   processor configuration does not finish and open procedure exits
>   with error.
> - However, this doesn't prevent u-boot network framework from
>   calling send and receive procedures.
> - Using transmit and receive functions of misconfigured packet
>   processor will cause traffic to get stuck.
>
> Fix:
>
> - Continue packet processor configuration even if autonegotiation
>   fails.  Only error message is triggered in this case.
> - Exit transmit and receive functions if there is no PHY link
>   indication.
> - U-boot network framework now calls open procedure again during next
>   transmit initiation.
>
> Signed-off-by: Stefan Chulski <stefanc at marvell.com>
> Reviewed-by: Igal Liberman <igall at marvell.com>
> Tested-by: Igal Liberman <igall at marvell.com>

Acked-by: Joe Hershberger <joe.hershberger at ni.com>