audio: stop reading sound trigger lab data on SSR

While sound trigger lab data being read, if CPE SSR
happens the pcm read returns -ENETRESET. Instead of
updating the sound card sate, mark the sound trigger
state as inactive to avoid reading the lab data from
driver. Marking the session as inactive handle both
CPE and ADSP SSR scenarios where HAL is prevented
to read from kernel.

Change-Id: Id82eed597c01265a7d26f17e5ac3c5cd0e17adbf
CRs-fixed: 790726

hal/audio_extn/soundtrigger.c

@@ -165,6 +165,7 @@ void audio_extn_sound_trigger_check_and_get_session(struct stream_in *in)
             in->config = st_ses_info->st_ses.config;
             in->channel_mask = audio_channel_in_mask_from_count(in->config.channels);
             in->is_st_session = true;
+            in->is_st_session_active = true;
             ALOGD("%s: capture_handle %d is sound trigger", __func__, in->capture_handle);
             break;
         }

hal/audio_hw.c

@@ -2571,6 +2571,12 @@ static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
             ALOGD(" %s: sound card is not active/SSR state", __func__);
             ret= -EIO;;
             goto exit;
+        } else {
+            if (in->is_st_session &&  !in->is_st_session_active) {
+                ALOGD(" %s: Sound trigger is not active/SSR", __func__);
+                ret= -EIO;;
+                goto exit;
+            }
         }
     }
 
@@ -2615,7 +2621,15 @@ exit:
     /* ToDo: There may be a corner case when SSR happens back to back during
        start/stop. Need to post different error to handle that. */
     if (-ENETRESET == ret) {
-        set_snd_card_state(adev,SND_CARD_STATE_OFFLINE);
+        /* CPE SSR results in kernel returning ENETRESET for sound trigger
+          session reading on LAB data. In this case do not set sound card state
+          offline, instead mark this sound trigger session inactive to avoid
+          further reading of LAB data from CPE driver. Marking the session
+          inactive handles both CPE and ADSP SSR for sound trigger session */
+        if (!in->is_st_session)
+            set_snd_card_state(adev,SND_CARD_STATE_OFFLINE);
+        else
+            in->is_st_session_active = false;
     }
     pthread_mutex_unlock(&in->lock);
 

hal/audio_hw.h

@@ -232,6 +232,7 @@ struct stream_in {
     audio_format_t format;
     audio_io_handle_t capture_handle;
     bool is_st_session;
+    bool is_st_session_active;
 
     struct audio_device *dev;
 };