Re: [PATCH net v2] net: macb: Properly handle phylink on at91rm9200

From: David Miller
Date: Thu Feb 20 2020 - 18:00:56 EST

From: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Date: Wed, 19 Feb 2020 15:15:51 +0100

> at91ether_init was handling the phy mode and speed but since the switch to
> phylink, the NCFGR register got overwritten by macb_mac_config(). The issue
> is that the RM9200_RMII bit and the MACB_CLK_DIV32 field are cleared
> but never restored as they conflict with the PAE, GBE and PCSSEL bits.
> Add new capability to differentiate between EMAC and the other versions of
> the IP and use it to set and avoid clearing the relevant bits.
> Also, this fixes a NULL pointer dereference in macb_mac_link_up as the EMAC
> doesn't use any rings/bufffers/queues.
> Fixes: 7897b071ac3b ("net: macb: convert to phylink")
> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>

Applied and queued up for -stable, thanks.