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Message-ID: <4BBDA92B.8010505@ladisch.de> Date: Thu, 08 Apr 2010 12:00:11 +0200 From: Clemens Ladisch <clemens@...isch.de> To: Tvrtko Ursulin <tvrtko@...ulin.net>, Takashi Iwai <tiwai@...e.de> CC: alsa-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: Re: Ooops when working with USB MIDI (2.6.33.1) Tvrtko Ursulin wrote: > I had TuxGuitar running and an external USB MIDI device, which I then > turned off, on, and exited TuxGuitar at which point there was this oops. > ... > [321182.618342] IP: [<ffffffff81375d65>] _raw_spin_lock_irq+0x15/0x30 > [321182.618449] [<ffffffffa01e2fca>] ? snd_usbmidi_output_drain+0x7a/0x100 [snd_usb_lib] > [321182.618462] [<ffffffffa01b7699>] ? snd_rawmidi_drain_output+0x119/0x180 [snd_rawmidi] I think that bug was introduced by this commit: http://git.kernel.org/linus/7a17daae8ed71bf3259d905a4fc48a5b424fa935 which causes the driver to free many internal data structures when they might still be in use by userspace. Please try to revert it. I think a proper fix would be to free the URBs/buffers but not the driver's data structures. Takashi, do you remember what the original problem was? Regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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