Re: [PATCH net v2] net: dsa: mv88e6xxx: Reset mv88e6393x force WD event bit

[Andrew Lunn]

On Fri, Mar 31, 2023 at 10:40:13AM +0200, Gustav Ekelund wrote:
> From: Gustav Ekelund <gustaek@xxxxxxxx>
> 
> The force watchdog event bit is not cleared during SW reset in the
> mv88e6393x switch. This is a different behavior compared to mv886390 which
> clears the force WD event bit as advertised. This causes a force WD event
> to be handled over and over again as the SW reset following the event never
> clears the force WD event bit.
> 
> Explicitly clear the watchdog event register to 0 in irq_action when
> handling an event to prevent the switch from sending continuous interrupts.
> Marvell aren't aware of any other stuck bits apart from the force WD
> bit.
> 
> Signed-off-by: Gustav Ekelund <gustaek@xxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew