1 files changed, 7 insertions, 18 deletions

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index 34b9bb7fe87c..8e01fa4991c5 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -126,7 +126,6 @@ struct snd_usb_midi {
                 struct snd_usb_midi_in_endpoint *in;
         } endpoints[MIDI_MAX_ENDPOINTS];
         unsigned long input_triggered;
-        bool autopm_reference;
         unsigned int opened[2];
         unsigned char disconnected;
         unsigned char input_running;
@@ -1040,7 +1039,6 @@ static int substream_open(struct snd_rawmidi_substream *substream, int dir,
 {
         struct snd_usb_midi* umidi = substream->rmidi->private_data;
         struct snd_kcontrol *ctl;
-        int err;
 
         down_read(&umidi->disc_rwsem);
         if (umidi->disconnected) {
@@ -1051,13 +1049,6 @@ static int substream_open(struct snd_rawmidi_substream *substream, int dir,
         mutex_lock(&umidi->mutex);
         if (open) {
                 if (!umidi->opened[0] && !umidi->opened[1]) {
-                        err = usb_autopm_get_interface(umidi->iface);
-                        umidi->autopm_reference = err >= 0;
-                        if (err < 0 && err != -EACCES) {
-                                mutex_unlock(&umidi->mutex);
-                                up_read(&umidi->disc_rwsem);
-                                return -EIO;
-                        }
                         if (umidi->roland_load_ctl) {
                                 ctl = umidi->roland_load_ctl;
                                 ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
@@ -1080,8 +1071,6 @@ static int substream_open(struct snd_rawmidi_substream *substream, int dir,
                                 snd_ctl_notify(umidi->card,
                                        SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
                         }
-                        if (umidi->autopm_reference)
-                                usb_autopm_put_interface(umidi->iface);
                 }
         }
         mutex_unlock(&umidi->mutex);
@@ -1455,6 +1444,7 @@ void snd_usbmidi_disconnect(struct list_head* p)
         }
         del_timer_sync(&umidi->error_timer);
 }
+EXPORT_SYMBOL(snd_usbmidi_disconnect);
 
 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
 {
@@ -1465,10 +1455,9 @@ static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
                                                                 int stream, int number)
 {
-        struct list_head* list;
+        struct snd_rawmidi_substream *substream;
 
-        list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
-                struct snd_rawmidi_substream *substream = list_entry(list, struct snd_rawmidi_substream, list);
+        list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, list) {
                 if (substream->number == number)
                         return substream;
         }
@@ -2091,6 +2080,7 @@ void snd_usbmidi_input_stop(struct list_head* p)
         }
         umidi->input_running = 0;
 }
+EXPORT_SYMBOL(snd_usbmidi_input_stop);
 
 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
 {
@@ -2120,6 +2110,7 @@ void snd_usbmidi_input_start(struct list_head* p)
                 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
         umidi->input_running = 1;
 }
+EXPORT_SYMBOL(snd_usbmidi_input_start);
 
 /*
  * Creates and registers everything needed for a MIDI streaming interface.
@@ -2256,11 +2247,9 @@ int snd_usbmidi_create(struct snd_card *card,
                 return err;
         }
 
+        usb_autopm_get_interface_no_resume(umidi->iface);
+
         list_add_tail(&umidi->list, midi_list);
         return 0;
 }
-
 EXPORT_SYMBOL(snd_usbmidi_create);
-EXPORT_SYMBOL(snd_usbmidi_input_stop);
-EXPORT_SYMBOL(snd_usbmidi_input_start);
-EXPORT_SYMBOL(snd_usbmidi_disconnect);