Re: MUSB interrupt storm on device removal

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On Mon, Jan 21, 2019 at 09:20:52PM +0000, Måns Rullgård wrote:
> Bin Liu <b-liu@xxxxxx> writes:
> 
> > On Fri, Jan 18, 2019 at 08:15:02PM +0000, Måns Rullgård wrote:
> >> Bin Liu <b-liu@xxxxxx> writes:
> >> 
> >> > On Mon, Dec 17, 2018 at 09:36:17PM +0000, Måns Rullgård wrote:
> >> >> Bin Liu <b-liu@xxxxxx> writes:
> >> >> 
> >> >> > On Mon, Dec 17, 2018 at 07:16:08PM +0000, Måns Rullgård wrote:
> >> >> >> Bin Liu <b-liu@xxxxxx> writes:
> >> >> >> 
> >> >> >> > Hi,
> >> >> >> >
> >> >> >> > On Mon, Dec 17, 2018 at 03:13:12PM +0000, Måns Rullgård wrote:
> >> >> >> >> I have a strange problem with the musb driver in host mode on AM3358
> >> >> >> >> (beaglebone) hardware.  If I connect a multi-port serial adapter and
> >
> > Is this on beaglebone or beagleboneblack?
> 
> We've seen it with Beaglebone Enhanced [1] and BeagleCore [2] based
> devices.  Both are based on the AM3358 and mostly compatible with the
> Beaglebone Black.
> 
> [1] https://elinux.org/SanCloud_BeagleBoneEnhanced
> [2] http://beaglecore.com/products/bcm1str.html

Okay, now I see you have a hub on the board. I just reproduced the
console lockup after added a hub in my setup. I will find some time to
debug this.

FYI, there was a similar issue in a few years ago, which was that the
hub routine never got called during the storm then the device disconnect
event never got populated from the hub driver. I am wondering if this is
the same issue pops up again...

Regards,
-Bin.



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