[PATCH v6 6/8] coresight: add support for CPU debug module
Leo Yan
leo.yan at linaro.org
Wed Apr 19 07:28:12 PDT 2017
Hi Suzuki,
On Wed, Apr 19, 2017 at 02:23:04PM +0100, Suzuki K Poulose wrote:
> Hi Leo,
>
> This version looks good to me. I have two minor comments below.
Thanks for reviewing. Will take the suggestions. Just check a bit for
last comment.
[...]
> >+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\n",
> >+ drvdata->cpu);
>
> May be we could warn about a possible issue in the DT ?
So can I understand the suggestion is to add warning in function
of_coresight_get_cpu() when cannot find CPU number, and here directly
bail out?
Thanks,
Leo Yan
More information about the linux-arm-kernel
mailing list