Re: [PATCH v3 1/2] net: dp83822: disable false carrier interrupt

[Andrew Lunn <andrew@lunn.ch>]

On Thu, Jun 23, 2022 at 03:46:44PM +0200, Enguerrand de Ribaucourt wrote:
> When unplugging an Ethernet cable, false carrier events were produced by
> the PHY at a very high rate. Once the false carrier counter full, an
> interrupt was triggered every few clock cycles until the cable was
> replugged. This resulted in approximately 10k/s interrupts.
> 
> Since the false carrier counter (FCSCR) is never used, we can safely
> disable this interrupt.
> 
> In addition to improving performance, this also solved MDIO read
> timeouts I was randomly encountering with an i.MX8 fec MAC because of
> the interrupt flood. The interrupt count and MDIO timeout fix were
> tested on a v5.4.110 kernel.
> 
> Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> Fixes: 87461f7a58ab ("net: phy: DP83822 initial driver submission")

For future reference, you should put these in the opposite order. Your
Signed-off-by should come last. Fixes generally comes first.

No need to resend for this patchset.

   Andrew