ASoC: intel: Drop superfluous PCM preallocation error checks

snd_pcm_lib_preallocate_pages() and co always succeed, so the error
check is simply redundant.  Drop it.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/intel/atom/sst-mfld-platform-pcm.c

@@ -687,20 +687,15 @@ static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_dai *dai = rtd->cpu_dai;
 	struct snd_pcm *pcm = rtd->pcm;
-	int retval = 0;
 
 	if (dai->driver->playback.channels_min ||
 			dai->driver->capture.channels_min) {
-		retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
+		snd_pcm_lib_preallocate_pages_for_all(pcm,
 			SNDRV_DMA_TYPE_CONTINUOUS,
 			snd_dma_continuous_data(GFP_DMA),
 			SST_MIN_BUFFER, SST_MAX_BUFFER);
-		if (retval) {
-			dev_err(rtd->dev, "dma buffer allocation failure\n");
-			return retval;
 	}
-	}
-	return retval;
+	return 0;
 }
 
 static int sst_soc_probe(struct snd_soc_component *component)

sound/soc/intel/baytrail/sst-baytrail-pcm.c

@@ -327,23 +327,16 @@ static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	size_t size;
 	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
 	struct sst_pdata *pdata = dev_get_platdata(component->dev);
-	int ret = 0;
 
 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 	    pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 		size = sst_byt_pcm_hardware.buffer_bytes_max;
-		ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
-							    SNDRV_DMA_TYPE_DEV,
+		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 						      pdata->dma_dev,
 						      size, size);
-		if (ret) {
-			dev_err(rtd->dev, "dma buffer allocation failed %d\n",
-				ret);
-			return ret;
-		}
 	}
 
-	return ret;
+	return 0;
 }
 
 static struct snd_soc_dai_driver byt_dais[] = {

sound/soc/intel/haswell/sst-haswell-pcm.c

@@ -946,27 +946,21 @@ static int hsw_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	struct sst_pdata *pdata = dev_get_platdata(component->dev);
 	struct hsw_priv_data *priv_data = dev_get_drvdata(component->dev);
 	struct device *dev = pdata->dma_dev;
-	int ret = 0;
 
 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 			pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
-		ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
+		snd_pcm_lib_preallocate_pages_for_all(pcm,
 			SNDRV_DMA_TYPE_DEV_SG,
 			dev,
 			hsw_pcm_hardware.buffer_bytes_max,
 			hsw_pcm_hardware.buffer_bytes_max);
-		if (ret) {
-			dev_err(rtd->dev, "dma buffer allocation failed %d\n",
-				ret);
-			return ret;
-		}
 	}
 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
 		priv_data->pcm[rtd->cpu_dai->id][SNDRV_PCM_STREAM_PLAYBACK].hsw_pcm = pcm;
 	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream)
 		priv_data->pcm[rtd->cpu_dai->id][SNDRV_PCM_STREAM_CAPTURE].hsw_pcm = pcm;
 
-	return ret;
+	return 0;
 }
 
 #define HSW_FORMATS \

sound/soc/intel/skylake/skl-pcm.c

@@ -1289,7 +1289,6 @@ static int skl_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	struct hdac_bus *bus = dev_get_drvdata(dai->dev);
 	struct snd_pcm *pcm = rtd->pcm;
 	unsigned int size;
-	int retval = 0;
 	struct skl *skl = bus_to_skl(bus);
 
 	if (dai->driver->playback.channels_min ||
@@ -1298,17 +1297,13 @@ static int skl_pcm_new(struct snd_soc_pcm_runtime *rtd)
 		size = CONFIG_SND_HDA_PREALLOC_SIZE * 1024;
 		if (size > MAX_PREALLOC_SIZE)
 			size = MAX_PREALLOC_SIZE;
-		retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
+		snd_pcm_lib_preallocate_pages_for_all(pcm,
 						SNDRV_DMA_TYPE_DEV_SG,
 						snd_dma_pci_data(skl->pci),
 						size, MAX_PREALLOC_SIZE);
-		if (retval) {
-			dev_err(dai->dev, "dma buffer allocation fail\n");
-			return retval;
-		}
 	}
 
-	return retval;
+	return 0;
 }
 
 static int skl_get_module_info(struct skl *skl, struct skl_module_cfg *mconfig)