From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Dietrich Subject: Re: unhandled interrupt from otg port Date: Tue, 19 Feb 2013 23:17:30 +0100 Message-ID: <4469776.MJZ64uWU3E@ax5200p> References: <1978166.seipGZS4QH@ax5200p> <5123B073.7060005@wwwdotorg.org> <3906801.pvZ5F8TrFD@ax5200p> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <3906801.pvZ5F8TrFD@ax5200p> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen Warren Cc: "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Venu Byravarasu List-Id: linux-tegra@vger.kernel.org On Tuesday 19 February 2013 23:12:53 Marc Dietrich wrote: > Stephen, > > On Tuesday 19 February 2013 10:03:47 Stephen Warren wrote: > > On 02/17/2013 04:48 AM, Marc Dietrich wrote: > > > Hi, > > > > > > I sometimes see unhandled irq from the otg port on my AC100 (kernel 3.8.0-rc7). > > > This happens randomly when the a cable is pluged into the mini usb port. Seems > > > the port generates an interrupt on probe which isn't handled. > > > > Perhaps Venu can explain this; he is our USB expert. > > > > > Any ideas? > > > > I'm slightly confused by your description though; I assume this problem > > happens when you boot with a USB cable already plugged in, not when you > > first boot the system, then plug in a cable? Is the cable connected to a > > host PC, or to a device? > > the cable is connected to a host PC. It is not shown when connecting after the > system has booted. Unfortunately, I cannot generate the error reproducible, e.g. > I just tried 10 times and nothing was shown. Maybe just forget it for now if > no one has an obvious idea. I'll try to find some reproducable situation and will > report back. arr, just found it: it happens when you load an uboot image via tegrarcm first - so this could be a kernel or uboot problem. Marc