Re: [PATCH net-next v5 4/5] net: dsa: mxl862xx: recover switch stuck in MCUboot rescue mode

[Andrew Lunn]

> +static int mxl862xx_sb_pdi_poll_drain(struct mxl862xx_priv *priv,
> +				      unsigned long timeout_ms)
> +{
> +	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
> +	int ret;
> +
> +	do {
> +		ret = mxl862xx_smdio_read(priv, MXL862XX_SB_PDI_STAT);
> +		if (ret < 0)
> +			return ret;
> +		if ((u16)ret == MXL862XX_SB_PDI_READY)
> +			return MXL862XX_DRAIN_READY;
> +		if ((u16)ret == 0)
> +			return MXL862XX_DRAIN_FEED;
> +		usleep_range(50, 150);
> +	} while (time_before(jiffies, timeout));

Again, iopoll.h should be better.

       Andrew