Re: [RFC Patch net-next v2] net: dsa: microchip: lan937x: enable interrupt for internal phy link detection

[Andrew Lunn]

> +static irqreturn_t lan937x_switch_irq_thread(int irq, void *dev_id)
> +{
> +	struct ksz_device *dev = dev_id;
> +	irqreturn_t result = IRQ_NONE;
> +	u32 data;
> +	int ret;
> +
> +	/* Read global interrupt status register */
> +	ret = ksz_read32(dev, REG_SW_INT_STATUS__4, &data);
> +	if (ret)
> +		return result;

I don't think you can return negative error numbers here.

> +
> +	if (data & POR_READY_INT) {
> +		ret = ksz_write32(dev, REG_SW_INT_STATUS__4, POR_READY_INT);
> +		if (ret)
> +			return result;

Returning IRQ_NONE here seems wrong. You handle the interrupt, so
should probably return IRQ_HANDLED.

      Andrew