At Tue, 22 Feb 2011 16:19:20 -0600, pl bossart wrote: > > >> Ah, I forgot to put my sign-off since I was waiting for any test > >> result... ÂHas anyone tried it? > > > > Doesn't work for me. same oops as before. Either I made a mistake when > > merging this patch manually (there were some rejects), or the problem > > is still there. > > Added some additional traces, the dereference takes place before the > mutex is unlocked. > > usb 3-1: USB disconnect, address 5 > ALSA card.c:556: locking USB shutdown mutex > ALSA urb.c:492: frame 0 active: -84 > ALSA urb.c:197: cannot submit urb (err = -19) > ALSA urb.c:492: frame 0 active: -84 > ALSA urb.c:197: cannot submit urb (err = -19) > ALSA urb.c:492: frame 0 active: -84 > ALSA urb.c:197: cannot submit urb (err = -19) > ALSA urb.c:492: frame 0 active: -84 > ALSA urb.c:197: cannot submit urb (err = -19) > ALSA urb.c:186: NULL substream (subs->running 0) > ALSA urb.c:186: NULL substream (subs->running 0) > ALSA card.c:575: UNlocking USB shutdown mutex Hmm. Is snd_usb_release_substream_urbs() is called properly before these errors? Is force=1 set? Also, in your log, it shows subs->running = 0. So, there is no NULL dereference. But, it's still strange since all active URLs must have been killed beforehand in deactivate_urbs() and the succeeding call of wait_clear_urbs()... Takashi -- 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
