netdev - Re: [PATCH net-next v2 8/8] net: mscc: PTP Hardware Clock (PHC) support

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Date:   Fri, 5 Jul 2019 15:02:24 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Antoine Tenart <antoine.tenart@...tlin.com>
Cc:     davem@...emloft.net, alexandre.belloni@...tlin.com,
        UNGLinuxDriver@...rochip.com, ralf@...ux-mips.org,
        paul.burton@...s.com, jhogan@...nel.org, netdev@...r.kernel.org,
        linux-mips@...r.kernel.org, thomas.petazzoni@...tlin.com,
        allan.nielsen@...rochip.com
Subject: Re: [PATCH net-next v2 8/8] net: mscc: PTP Hardware Clock (PHC)
 support

On Fri, Jul 05, 2019 at 09:52:13PM +0200, Antoine Tenart wrote:
> +static irqreturn_t ocelot_ptp_rdy_irq_handler(int irq, void *arg)
> +{
> +	struct ocelot *ocelot = arg;
> +
> +	do {

> +		/* Check if a timestamp can be retrieved */
> +		if (!(val & SYS_PTP_STATUS_PTP_MESS_VLD))
> +			break;

As in my reply on v1, I suggest adding a sanity check on this ISR's
infinite loop.

> +	} while (true);
> +
> +	return IRQ_HANDLED;
> +}

Thanks,
Richard