>>> Ah-ha, actually, when taking a closer look at this, I see that lgff
>>> isn't using ID "0", it's actually using "the first report in the
>>> list", without using an ID at all. This appears to be true for all the
>>> lg*ff devices, actually. Instead of validating ID 0, it needs to
>>> validate "the first report".
> + if (!report && id == 0) {
> + /*
> + * Requesting id 0 means we should fall back to the first
> + * report in the list.
> + */
> + report = list_entry(
> + hid->report_enum[type].report_list.next,
> + struct hid_report, list);
> + }
Is the task of this check to locate/check the 'output' report? Because for
this particular device it is defined in Report ID 3, the third one in
descriptor. So would presumably still fail to be found.
I don't have any devices which use hid-lgff, but have some which use
hid-lg4ff which was also changed to perform the same test. I can check
their operation/HID reports over the weekend.
Simon.
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