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authorTakashi Iwai <tiwai@suse.de>2012-11-19 09:55:06 +0100
committerTakashi Iwai <tiwai@suse.de>2012-11-19 09:55:06 +0100
commit0ced14fbda44bf9c4977f1b01ae1077b944b94ab (patch)
tree769b24e0a924e1bca28290ca41af7675e7586bf5 /sound
parent10e44239f67d0b6fb74006e61a7e883b8075247a (diff)
parente99ddfde6ae0dd2662bb40435696002b590e4057 (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.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index c83f6143c0e..eeefbce3873 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;
}