ALSA: usb: Remove superfluous snd_dma_continuous_data()

The recent change (commit 08422d2c: "ALSA: memalloc: Allow NULL
device for SNDRV_DMA_TYPE_CONTINUOUS type") made the PCM preallocation
helper accepting NULL as the device pointer for the default usage.
Drop the snd_dma_continuous_data() usage that became superfluous from
the callers.

Link: https://lore.kernel.org/r/20191105151856.10785-7-tiwai@suse.deSigned-off-by: NTakashi Iwai <tiwai@suse.de>

sound/usb/line6/pcm.c

@@ -502,9 +502,7 @@ static int snd_line6_new_pcm(struct usb_line6 *line6, struct snd_pcm **pcm_ret)
 
 	/* pre-allocation of buffers */
 	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
-					      snd_dma_continuous_data
-					      (GFP_KERNEL), 64 * 1024,
-					      128 * 1024);
+					      NULL, 64 * 1024, 128 * 1024);
 	return 0;
 }
 

sound/usb/usx2y/usbusx2yaudio.c

@@ -970,13 +970,13 @@ static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint,
 	if (playback_endpoint) {
 		snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
 					      SNDRV_DMA_TYPE_CONTINUOUS,
-					      snd_dma_continuous_data(GFP_KERNEL),
+					      NULL,
 					      64*1024, 128*1024);
 	}
 
 	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
 				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      snd_dma_continuous_data(GFP_KERNEL),
+				      NULL,
 				      64*1024, 128*1024);
 	usX2Y(card)->pcm_devs++;
 

sound/usb/usx2y/usx2yhwdeppcm.c

@@ -728,11 +728,11 @@ int usX2Y_hwdep_pcm_new(struct snd_card *card)
 	sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio");
 	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
 				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      snd_dma_continuous_data(GFP_KERNEL),
+				      NULL,
 				      64*1024, 128*1024);
 	snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
 				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      snd_dma_continuous_data(GFP_KERNEL),
+				      NULL,
 				      64*1024, 128*1024);
 
 	return 0;