>
> On Mon, Jan 20, 2020 at 09:48:24AM +0000, Peter Chen wrote:
> >
> > > On Mon, Jan 20, 2020 at 09:03:59AM +0000, Peter Chen wrote:
> > > > Hi all,
> > > >
> > > > >From commit 1cbfb8c4f62d ("usb: gadget: Quieten gadget config
> > > > >message"),
> > > > there is no any message from gadget side after it connects to host
> > > > and works correctly. Although we could cat "state" under
> > > > /sys/class/udc/$CONTROLLER/ to know its state, we can't easily
> > > > know if the gadget works or not from console, USB host could have
> > > > many messages after one device has connected, why we can't keep
> > > > one for USB gadget?
> > >
> > > Why not make "normal" USB devices quieter too? :)
> > >
> > > Surely you do not have tools that watch syslog to determine if a
> > > device is working properly or not, right? That's what sysfs is for, not syslog
> entries.
> > >
> >
> > Yes, we use our eyes during the hot plug test for device or count the
> > number of messages for it, with this change, it may cause difficult
> > for hot plug test. For other tests, we could judge sysfs before later tests.
> >
> > Since this message in there many years, we (and tester) may need time
> > to adapt for this change.
>
> Can you just turn on dynamic debugging for that one line with a simple echo to the
> debugfs file so that you still see this in your test framework?
>
No, most released kernel or end user's kernel doesn't enable dynamic debug.
In fact, we use this message in formal release product to quick judge if the
device function is ok, not just in development periods.
Peter
