Re: [linux-usb-devel] Fw: BUG: Kernel panic when disconnecting Edirol USB2 audio interface

[Colin Fletcher <colinf@axicon.com>]

Clemens Ladisch wrote:
> You didn't mention that the device was currently playing/recording, so
> I assume it wasn't.  

Correct. Simply plugging in and unplugging the USB cable (or powering
the UA-1000 on and off) causes the oops every time.

> In this case, the oops apparently happens when the
> MIDI URBs are canceled (the MIDI input URBs are active as long as the
> driver is loaded).  Please try the attached patch; it adds two printk()s
> around the snd_usbmidi_disconnect() function.  If my theory is correct,
> the oops should happen immediately after the "killing MIDI URBs..."
> message.

I don't see the "killing MIDI URBs..." message at all.

> BTW: I never had the opportunity to test my code for the UA-1000.
> Does playback/capture/MIDI work?

jackd will connect to the UA-1000, at which point the 10 output state
LEDs on the front light up, and the output meter shows signals when I
play sound through it, but it's a bit unstable: it will stop working 
after a short while. I haven't investigated any further.


Colin Fletcher.

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