> > +static irqreturn_t adin1110_irq(int irq, void *p)
> > +{
> > + struct adin1110_priv *priv = p;
> > + u32 status1;
> > + u32 val;
> > + int ret;
> > + int i;
> > +
> > + mutex_lock(&priv->lock);
>
> The MDIO bus operations are using the same lock. MDIO can be quite
> slow. Do you really need mutual exclusion between MDIO and interrupts?
> What exactly is this lock protecting?
>
> Andrew
Hi Andrew,
Thanks for all the help here.
With this lock I am mainly protecting SPI read/writes. The hardware doesn't expose the MDIO pins.
In order to read/write a PHY reg, there has to be a SPI read/write to the device, the same
line where the MAC is programmed and ethernet frames are sent/received, not very efficient I know.
Best regards,
Alexandru
