On Mon, Mar 11, 2013 at 6:24 PM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * Grazvydas Ignotas <notasas@xxxxxxxxx> [130309 16:53]: >> VBUS_ERROR is a serious error that the driver often doesn't recover from >> in my tests, so we should at least inform the user about it. > > Patch makes sens to me, just a related question.. > > Do you get this when trying to enable the host mode, right? Or have you seen > this in other situations too? I sometimes see it when booting with cable connected to PC or connecting cable to PC after using a host adapter. In those cases OTG port dies completely until a powercycle :( > If the error happens when enabling the host mode, my experience is that > the VBUS_ERROR is caused by the musb trying to be too smart and doing the > timeouts automatically. If the VBUS on the hardware does not raise fast > enough to the right range for whatever reason, musb can produce this > error. Yeah the driver seems to expect that and has a "ignore" variable, I use KERN_DEBUG level in case it's set. > > Regards, > > Tony > -- Gražvydas -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
