Re: [PATCH 7/7] net: dsa: b53: Expose PTP timestamping ioctls to userspace

On Thu, Nov 04, 2021 at 02:32:01PM +0100, Martin Kaistra wrote:

+static int b53_set_hwtstamp_config(struct b53_device *dev, int port,
+				   struct hwtstamp_config *config)
+{
+	struct b53_port_hwtstamp *ps = &dev->ports[port].port_hwtstamp;
+	bool tstamp_enable = false;
+
+	clear_bit_unlock(B53_HWTSTAMP_ENABLED, &ps->state);
+
+	/* Reserved for future extensions */
+	if (config->flags)
+		return -EINVAL;
+
+	switch (config->tx_type) {
+	case HWTSTAMP_TX_ON:
+		tstamp_enable = true;
+		break;
+	case HWTSTAMP_TX_OFF:
+		tstamp_enable = false;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config->rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		tstamp_enable = false;
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:

This is incorrect.  HWTSTAMP_FILTER_PTP_V2_EVENT includes support for
UDP/IPv4 and UDP/IPv6.  Driver should return error here.

+	case HWTSTAMP_FILTER_ALL:
+		config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+		break;
+	default:
+		return -ERANGE;
+	}

Thanks,
Richard