1 files changed, 8 insertions, 0 deletions

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index db2dc5ffe6dd..b4b39c0b6c9e 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -54,6 +54,7 @@
 #include <sound/asequencer.h>
 #include "usbaudio.h"
 #include "midi.h"
+#include "power.h"
 #include "helper.h"
 
 /*
@@ -1044,6 +1045,7 @@ static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
         struct snd_usb_midi* umidi = substream->rmidi->private_data;
         struct usbmidi_out_port* port = NULL;
         int i, j;
+        int err;
 
         for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
                 if (umidi->endpoints[i].out)
@@ -1056,6 +1058,9 @@ static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
                 snd_BUG();
                 return -ENXIO;
         }
+        err = usb_autopm_get_interface(umidi->iface);
+        if (err < 0)
+                return -EIO;
         substream->runtime->private_data = port;
         port->state = STATE_UNKNOWN;
         substream_open(substream, 1);
@@ -1064,7 +1069,10 @@ 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;
+
         substream_open(substream, 0);
+        usb_autopm_put_interface(umidi->iface);
         return 0;
 }