[PATCH v8 3/3] dmaengine: add driver for Sophgo CV18XX/SG200X dmamux

[Inochi Amaoto]

On Mon, Jul 29, 2024 at 01:38:06PM GMT, Markus Elfring wrote:
> …
> > +++ b/drivers/dma/cv1800-dmamux.c
> > @@ -0,0 +1,259 @@
> …
> > +static void cv1800_dmamux_free(struct device *dev, void *route_data)
> > +{
> …
> > +	unsigned long flags;
> > +
> > +	spin_lock_irqsave(&dmamux->lock, flags);
> …
> > +	spin_unlock_irqrestore(&dmamux->lock, flags);
> …
> 
> Under which circumstances would you become interested to apply a statement
> like “guard(spinlock_irqsave)(&dmamux->lock);”?
> https://elixir.bootlin.com/linux/v6.10.2/source/include/linux/spinlock.h#L574
> 
> Regards,
> Markus

This is very useful and I am pretty intersted, but I am not sure it
is suitable. Could you share some technical detail (or some documents)
about this method?

Regards,
Inochi