netdev - Re: [PATCH v3 net] net: phy: micrel: set soft_reset callback to genphy_soft

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Date:   Thu, 25 Feb 2021 02:59:51 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Christian Melki <christian.melki@...ata.com>
Cc:     kuba@...nel.org, hkallweit1@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v3 net] net: phy: micrel: set soft_reset callback to
 genphy_soft_reset for KSZ8081

On Wed, Feb 24, 2021 at 09:55:36PM +0100, Christian Melki wrote:
> Following a similar reinstate for the KSZ9031.
> 
> Older kernels would use the genphy_soft_reset if the PHY did not implement
> a .soft_reset.
> 
> Bluntly removing that default may expose a lot of situations where various
> PHYs/board implementations won't recover on various changes.
> Like with this implementation during a 4.9.x to 5.4.x LTS transition.
> I think it's a good thing to remove unwanted soft resets but wonder if it
> did open a can of worms?
> 
> Atleast this fixes one iMX6 FEC/RMII/8081 combo.
> 
> Fixes: 6e2d85ec0559 ("net: phy: Stop with excessive soft reset")
> Signed-off-by: Christian Melki <christian.melki@...ata.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew