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Date: Tue, 25 Nov 2014 09:24:46 +0100 From: Sebastian Andrzej Siewior <bigeasy@...utronix.de> To: balbi@...com CC: George Cherian <george.cherian@...com>, gregkh@...uxfoundation.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] usb: musb: core: Disable the Interrupts till BABBLE is fully handled On 11/25/2014 02:09 AM, Felipe Balbi wrote: > >> I *think* for some reason the host did not really receive ep0 >> set_config request as planned. And device's answer is probably then >> interpreted as data which is not expected (as Felipe said "device side >> tries to move data without the host asking for anything"). > > that's definitely a bug, unfortunately I can't think of any Erratum > right now. maybe there will be a new one :) >>>> That's certainly babble :-) >>> >>> Certainly! But musb shouldn't fall over or lock up because of it, >>> should it? >> >> No and the patch fixes the issue. The strange thing is that it only >> happens on the same device. Not if you connect host<->device with two >> boards. > > probably some crap going on within the interconnect when both instances > are used. Either that or something is synchronized since both instances use probably the same clock source. But there is definitely something switched off since it does not happen without PM enabled. Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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