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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