Hi Takashi,
FYI, there are new smatch warnings show up in
tree: git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-unstable.git master head: d34bb8cb0b61e91a036aa516dc6f9ced5af2adc4 commit: 6e28507b716f16618070517dbfcaafe2ca7e9cbe ALSA: usb-audio: Fix missing autopm for MIDI input date: 6 hours ago
+ sound/usb/midi.c:1088 substream_open() warn: inconsistent returns mutex:&umidi->mutex: locked (1058) unlocked (1048,1088) sound/usb/midi.c:2166 snd_usbmidi_create() error: we previously assumed 'quirk' could be null (see line 2155)
git remote update sound-unstable git checkout 6e28507b716f16618070517dbfcaafe2ca7e9cbe vim +1088 sound/usb/midi.c
96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1042 struct snd_kcontrol *ctl; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1043 int err; 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1044 cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1045 down_read(&umidi->disc_rwsem); cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1046 if (umidi->disconnected) { cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1047 up_read(&umidi->disc_rwsem); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 @1048 return open ? -ENODEV : 0; cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1049 } cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1050 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1051 mutex_lock(&umidi->mutex); 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1052 if (open) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1053 if (!umidi->opened[0] && !umidi->opened[1]) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1054 err = usb_autopm_get_interface(umidi->iface); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1055 umidi->autopm_reference = err >= 0; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1056 if (err < 0 && err != -EACCES) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1057 up_read(&umidi->disc_rwsem); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 @1058 return -EIO; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1059 } 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1060 if (umidi->roland_load_ctl) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1061 ctl = umidi->roland_load_ctl; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1062 ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1063 snd_ctl_notify(umidi->card, 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1064 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1065 update_roland_altsetting(umidi); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1066 } 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1067 } 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1068 umidi->opened[dir]++; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1069 if (umidi->opened[1]) 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1070 snd_usbmidi_input_start(&umidi->list); 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1071 } else { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1072 umidi->opened[dir]--; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1073 if (!umidi->opened[1]) 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1074 snd_usbmidi_input_stop(&umidi->list); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1075 if (!umidi->opened[0] && !umidi->opened[1]) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1076 if (umidi->roland_load_ctl) { 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1077 ctl = umidi->roland_load_ctl; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1078 ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1079 snd_ctl_notify(umidi->card, 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1080 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1081 } 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1082 if (umidi->autopm_reference) 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 1083 usb_autopm_put_interface(umidi->iface); 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1084 } 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1085 } 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1086 mutex_unlock(&umidi->mutex); cea1c011 sound/usb/midi.c Takashi Iwai 2012-12-03 1087 up_read(&umidi->disc_rwsem); 6e28507b sound/usb/midi.c Takashi Iwai 2012-12-03 @1088 return 0; 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1089 } 96f61d9a sound/usb/usbmidi.c Clemens Ladisch 2009-10-22 1090 86e07d34 sound/usb/usbmidi.c Takashi Iwai 2005-11-17 1091 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
--- 0-DAY kernel build testing backend Open Source Technology Center Fengguang Wu, Yuanhan Liu Intel Corporation