ASoC: Intel: avs: Lock substream before snd_pcm_stop()

snd_pcm_stop() shall be called with stream lock held to prevent any
races between nonatomic streaming operations.

Fixes: 2f1f570c ("ASoC: Intel: avs: Coredump and recovery flow")
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221116115550.1100398-2-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/avs/ipc.c

@@ -123,7 +123,10 @@ static void avs_dsp_recovery(struct avs_dev *adev)
 				if (!substream || !substream->runtime)
 					continue;
 
+				/* No need for _irq() as we are in nonatomic context. */
+				snd_pcm_stream_lock(substream);
 				snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
+				snd_pcm_stream_unlock(substream);
 			}
 		}
 	}