ALSA: snd-usb: fix stream info output in /proc

Set some substream struct members to make the proc interface code work
again.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: Felix Homann <linuxaudio@showlabor.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 2d3a04d829b7..24839d932648 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -474,6 +474,11 @@ unlock:
                 mutex_unlock(&subs->stream->chip->shutdown_mutex);
         }
 
+        if (ret == 0) {
+                subs->interface = fmt->iface;
+                subs->altset_idx = fmt->altset_idx;
+        }
+
         return ret;
 }
 
@@ -1123,13 +1128,16 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
                 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
                 subs->data_endpoint->retire_data_urb = retire_playback_urb;
+                subs->running = 1;
                 return 0;
         case SNDRV_PCM_TRIGGER_STOP:
                 stop_endpoints(subs, 0, 0, 0);
+                subs->running = 0;
                 return 0;
         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                 subs->data_endpoint->prepare_data_urb = NULL;
                 subs->data_endpoint->retire_data_urb = NULL;
+                subs->running = 0;
                 return 0;
         }
 
@@ -1148,15 +1156,19 @@ int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int c
                         return err;
 
                 subs->data_endpoint->retire_data_urb = retire_capture_urb;
+                subs->running = 1;
                 return 0;
         case SNDRV_PCM_TRIGGER_STOP:
                 stop_endpoints(subs, 0, 0, 0);
+                subs->running = 0;
                 return 0;
         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                 subs->data_endpoint->retire_data_urb = NULL;
+                subs->running = 0;
                 return 0;
         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
                 subs->data_endpoint->retire_data_urb = retire_capture_urb;
+                subs->running = 1;
                 return 0;
         }