On Thu, May 11, 2017 at 11:12:32AM -0600, Mathieu Poirier wrote:

[...]

quoted

+static int debug_probe(struct amba_device *adev, const struct amba_id *id)
+{
+	void __iomem *base;
+	struct device *dev = &adev->dev;
+	struct debug_drvdata *drvdata;
+	struct resource *res = &adev->res;
+	struct device_node *np = adev->dev.of_node;
+	int ret;
+
+	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	drvdata->cpu = np ? of_coresight_get_cpu(np) : 0;
+	if (per_cpu(debug_drvdata, drvdata->cpu)) {
+		dev_err(dev, "CPU%d drvdata has been initialized, "

s/"has been"/"has already been"

That way it really look like an error message.

Will fix.

Also debug_probe() uses dev_xyz() but everywhere else in the driver it is
pr_xyz() - any specific reason for that?  I suggest moving to dev_xyz().

Some logs are shared for all device instances, so I think should use
pr_xyz(); will spin a new version to change other places to use
dev_xyz() if the logs are for specific device instance.

Otherwise things look good.

[...]

Thanks,
Leo Yan