I guess it happens on a BeagleBone Black: do you get a single warning or
multiple repeated messages?
Reading the code, that's a one shot spurious event:
drivers/usb/musb/musb_core.c::musb_stage0_irq()
...
/* During connection as an A-Device, we may see a short
* current spikes causing voltage drop, because of cable
* and peripheral capacitance combined with vbus draw.
* (So: less common with truly self-powered devices, where
* vbus doesn't act like a power supply.)
*
* Such spikes are short; usually less than ~500 usec, max
* of ~2 msec. That is, they're not sustained overcurrent
* errors, though they're reported using VBUSERROR irqs.
*
* Workarounds: (a) hardware: use self powered devices.
* (b) software: ignore non-repeated VBUS errors.
...
and it might not be related to your wifi dongle not working.
Does the same wifi usb dongle work on a x86 box? And could you test it
against a vivid kernel there? Which kernel module does it pick up?
On a 4.2 wily kernel i have a match for that vendor/product id:
git grep 148f
...
drivers/net/wireless/mediatek/mt7601u/usb.c: { USB_DEVICE(0x148f, 0x7601) },
<--- HERE
drivers/net/wireless/mediatek/mt7601u/usb.c: { USB_DEVICE(0x148f, 0x760a) },
drivers/net/wireless/mediatek/mt7601u/usb.c: { USB_DEVICE(0x148f, 0x760b) },
drivers/net/wireless/mediatek/mt7601u/usb.c: { USB_DEVICE(0x148f, 0x760c) },
drivers/net/wireless/mediatek/mt7601u/usb.c: { USB_DEVICE(0x148f, 0x760d) },
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x1706) },
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x2570) },
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x9020) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2770) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2870) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3071) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3072) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3370) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x8070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3572) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0xf301) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3573) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5370) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5372) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5572) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0xf101) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x9021) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x2573) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x2671) },
while i don't have any match in vivid, and that mediatek driver is
completely missing there:
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x1706) },
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x2570) },
drivers/net/wireless/rt2x00/rt2500usb.c: { USB_DEVICE(0x148f, 0x9020) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2770) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x2870) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3071) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3072) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3370) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x8070) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3572) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0xf301) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x3573) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5370) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5372) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0x5572) },
drivers/net/wireless/rt2x00/rt2800usb.c: { USB_DEVICE(0x148f, 0xf101) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x9021) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x2573) },
drivers/net/wireless/rt2x00/rt73usb.c: { USB_DEVICE(0x148f, 0x2671) },
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https://bugs.launchpad.net/bugs/1491094
Title:
wifi USB dongle fails to work with musb-hdrc error
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