linux-kernel - Re: [PATCH net 2/3] Revert "net: bcmgenet: soft reset 40nm EPHYs before MAC init"

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Date:   Tue, 5 Nov 2019 19:45:21 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Doug Berger <opendmb@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     bcm-kernel-feedback-list@...adcom.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 2/3] Revert "net: bcmgenet: soft reset 40nm EPHYs
 before MAC init"



On 11/5/2019 11:07 AM, Doug Berger wrote:
> This reverts commit 1f515486275a08a17a2c806b844cca18f7de5b34.
> 
> This commit improved the chances of the umac resetting cleanly by
> ensuring that the PHY was restored to its normal operation prior
> to resetting the umac. However, there were still cases when the
> PHY might not be driving a Tx clock to the umac during this window
> (e.g. when the PHY detects no link).
> 
> The previous commit now ensures that the unimac receives clocks
> from the MAC during its reset window so this commit is no longer
> needed. This commit also has an unintended negative impact on the
> MDIO performance of the UniMAC MDIO interface because it is used
> before the MDIO interrupts are reenabled, so it should be removed.
> 
> Signed-off-by: Doug Berger <opendmb@...il.com>

Acked-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian