Date: Tue, 23 Feb 2016 08:36:57 -0600 From: Larry Rosenman <ler@lerctr.org> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-current@freebsd.org Subject: Re: new computer, strange usb messages at boot Message-ID: <2d1856356851f44edc5d3aaf506dc6ea@thebighonker.lerctr.org> In-Reply-To: <be0d8f43a9a945e2400090afff4f07bc@thebighonker.lerctr.org> References: <20160220051951.GA47875@lrosenman-dell.lerctr.org> <20160220120401.GA91220@kib.kiev.ua> <20160220122416.GA1026@lrosenman-dell.lerctr.org> <2575cfd714188f7ffbc873cb5d87cc97@thebighonker.lerctr.org> <56CAB468.4070201@selasky.org> <be0d8f43a9a945e2400090afff4f07bc@thebighonker.lerctr.org>
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On 2016-02-23 08:28, Larry Rosenman wrote:
> On 2016-02-22 01:10, Hans Petter Selasky wrote:
>> On 02/21/16 17:28, Larry Rosenman wrote:
>>> Does this mean that the touch screen is hitting a limit in FreeBSD's
>>> driver?
>>
>> Yes, the hid driver is limiting the range of some report. This should
>> be harmless. You would need to dump the HID descriptor to see the
>> limits. Maybe we could raise the limit from 256 to 4096 or something
>> in that range, to make the warning to away. It's
>>
>> sys/dev/usb/usb_hid.c:
>>
>>> /* range check usage count */
>>> if (c->loc.count > 255) {
>>> DPRINTFN(0, "Number
>>> of "
>>> "items truncated
>>> to 255\n");
>>> s->ncount = 255;
>>> } else
>>> s->ncount =
>>> c->loc.count;
>>>
>>
>> Try adding c->loc.count to the printout, to see the limit it is
>> exceeding.
>>
>> --HPS
>
> hid_get_item: Number of items truncated to 255 (was 256)
Any chance of someone(tm) committing this small patch to add this info
by
default?
Index: usb_hid.c
===================================================================
--- usb_hid.c (revision 295874)
+++ usb_hid.c (working copy)
@@ -354,7 +354,8 @@
/* range check usage count */
if (c->loc.count > 255) {
DPRINTFN(0, "Number of "
- "items truncated to 255\n");
+ "items truncated to 255 "
+ "(was
%d)\n",c->loc.count);
s->ncount = 255;
} else
s->ncount = c->loc.count;
$
--
Larry Rosenman http://www.lerctr.org/~ler
Phone: +1 214-642-9640 E-Mail: ler@lerctr.org
US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961
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