Hi Richard,

Thank you for your review!

From: Richard Cochran, Sent: Wednesday, September 21, 2022 11:35 PM

On Wed, Sep 21, 2022 at 05:47:43PM +0900, Yoshihiro Shimoda wrote:

quoted

+static int rcar_gen4_ptp_gettime(struct ptp_clock_info *ptp,
+				 struct timespec64 *ts)
+{
+	struct rcar_gen4_ptp_private *ptp_priv = ptp_to_priv(ptp);
+
+	ts->tv_nsec = ioread32(ptp_priv->addr + ptp_priv->offs->monitor_t0);
+	ts->tv_sec = ioread32(ptp_priv->addr + ptp_priv->offs->monitor_t1) |
+		     ((s64)ioread32(ptp_priv->addr + ptp_priv->offs->monitor_t2) << 32);

No locking here ...

quoted

+	return 0;
+}
+
+static int rcar_gen4_ptp_settime(struct ptp_clock_info *ptp,
+				 const struct timespec64 *ts)
+{
+	struct rcar_gen4_ptp_private *ptp_priv = ptp_to_priv(ptp);
+
+	iowrite32(1, ptp_priv->addr + ptp_priv->offs->disable);
+	iowrite32(0, ptp_priv->addr + ptp_priv->offs->config_t2);
+	iowrite32(0, ptp_priv->addr + ptp_priv->offs->config_t1);
+	iowrite32(0, ptp_priv->addr + ptp_priv->offs->config_t0);
+	iowrite32(1, ptp_priv->addr + ptp_priv->offs->enable);
+	iowrite32(ts->tv_sec >> 32, ptp_priv->addr + ptp_priv->offs->config_t2);
+	iowrite32(ts->tv_sec, ptp_priv->addr + ptp_priv->offs->config_t1);
+	iowrite32(ts->tv_nsec, ptp_priv->addr + ptp_priv->offs->config_t0);

... or here?

You need to protect multiple register access against concurrent callers.

I understood it. I'll add such protections.

Best regards,
Yoshihiro Shimoda

Thanks,
Richard

quoted

+	return 0;
+}