diff options
| author | Takashi Iwai | 2012-11-19 09:55:06 +0100 |
|---|---|---|
| committer | Takashi Iwai | 2012-11-19 09:55:06 +0100 |
| commit | 0ced14fbda44bf9c4977f1b01ae1077b944b94ab (patch) | |
| tree | 769b24e0a924e1bca28290ca41af7675e7586bf5 /sound | |
| parent | 10e44239f67d0b6fb74006e61a7e883b8075247a (diff) | |
| parent | e99ddfde6ae0dd2662bb40435696002b590e4057 (diff) | |
Merge branch 'usb-midi-fix-3.7' of git://git.alsa-project.org/alsa-kprivate into for-linus
Merge a regression fix for USB MIDI on non-standard usb-audio drivers
by Clemens.
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/midi.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/usb/midi.c b/sound/usb/midi.c index c83f6143c0eb..eeefbce3873c 100644 --- a/sound/usb/midi.c +++ b/sound/usb/midi.c @@ -148,6 +148,7 @@ struct snd_usb_midi_out_endpoint { struct snd_usb_midi_out_endpoint* ep; struct snd_rawmidi_substream *substream; int active; + bool autopm_reference; uint8_t cable; /* cable number << 4 */ uint8_t state; #define STATE_UNKNOWN 0 @@ -1076,7 +1077,8 @@ static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) return -ENXIO; } err = usb_autopm_get_interface(umidi->iface); - if (err < 0) + port->autopm_reference = err >= 0; + if (err < 0 && err != -EACCES) return -EIO; substream->runtime->private_data = port; port->state = STATE_UNKNOWN; @@ -1087,9 +1089,11 @@ static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream) static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream) { struct snd_usb_midi* umidi = substream->rmidi->private_data; + struct usbmidi_out_port *port = substream->runtime->private_data; substream_open(substream, 0); - usb_autopm_put_interface(umidi->iface); + if (port->autopm_reference) + usb_autopm_put_interface(umidi->iface); return 0; } |