[PATCH] coresight: platform: check the availability of the endpoint before parse

[Jie Gan]

On 3/20/2026 5:23 PM, Leo Yan wrote:
> Hi Jie,
> 
> On Fri, Mar 20, 2026 at 04:44:54PM +0800, Jie Gan wrote:
> 
> [...]
> 
>> It's about the coresight_find_device_by_fwnode() returns NULL, resulting in
>> -EPROBE_DEFER. So the probe process will re-start after several seconds, but
>> always failed because we have a "disabled" device node in DT(we can see this
>> device in DT, but it never becomes available). It's ok if the device only
>> has one remote device, but has issue with more than one remote devices.
>>
>> Consider below situation:
>>
>>        device0
>>     |          |
>>    device1  device2(status = "disabled")
>>
>> The probe of device0 succeeds only when device1 and device2 are available at
>> probe time. But I think it's ok to probe the device0 only with device1
>> available.
> 
> Thanks a lot for details.  We might need to report warning or error if
> all remote endpoints fail (e.g., device1/device2 both are disabled),
> this is a rare case so would be low priority.
> 
> For this patch:
> 
> Reviewed-by: Leo Yan <leo.yan at arm.com>

Gentle ping.

Thanks,
Jie