ALSA: echoaudio: Avoid non-standard macro usage

Pass the device pointer from the PCI pointer directly, instead of a
non-standard macro.  The macro didn't give any better readability.

Also slightly refactor the code (drop the return value check from the
preallocation) as it never returns an error.

Link: https://lore.kernel.org/r/20191105151856.10785-21-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/echoaudio/echoaudio.c

@@ -324,7 +324,7 @@ static int pcm_open(struct snd_pcm_substream *substream,
 
 	/* Finally allocate a page for the scatter-gather list */
 	if ((err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
-				       snd_dma_pci_data(chip->pci),
+				       &chip->pci->dev,
 				       PAGE_SIZE, &pipe->sgpage)) < 0) {
 		dev_err(chip->card->dev, "s-g list allocation failed\n");
 		return err;
@@ -865,7 +865,7 @@ static const struct snd_pcm_ops digital_capture_ops = {
 /* Preallocate memory only for the first substream because it's the most
  * used one
  */
-static int snd_echo_preallocate_pages(struct snd_pcm *pcm, struct device *dev)
+static void snd_echo_preallocate_pages(struct snd_pcm *pcm, struct device *dev)
 {
 	struct snd_pcm_substream *ss;
 	int stream;
@@ -876,8 +876,6 @@ static int snd_echo_preallocate_pages(struct snd_pcm *pcm, struct device *dev)
 						      dev,
 						      ss->number ? 0 : 128<<10,
 						      256<<10);
-
-	return 0;
 }
 
 
@@ -904,8 +902,7 @@ static int snd_echo_new_pcm(struct echoaudio *chip)
 	strcpy(pcm->name, chip->card->shortname);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &analog_playback_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &analog_capture_ops);
-	if ((err = snd_echo_preallocate_pages(pcm, snd_dma_pci_data(chip->pci))) < 0)
-		return err;
+	snd_echo_preallocate_pages(pcm, &chip->pci->dev);
 
 #ifdef ECHOCARD_HAS_DIGITAL_IO
 	/* PCM#1 Digital inputs, no outputs */
@@ -916,8 +913,7 @@ static int snd_echo_new_pcm(struct echoaudio *chip)
 	chip->digital_pcm = pcm;
 	strcpy(pcm->name, chip->card->shortname);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &digital_capture_ops);
-	if ((err = snd_echo_preallocate_pages(pcm, snd_dma_pci_data(chip->pci))) < 0)
-		return err;
+	snd_echo_preallocate_pages(pcm, &chip->pci->dev);
 #endif /* ECHOCARD_HAS_DIGITAL_IO */
 
 #else /* ECHOCARD_HAS_VMIXER */
@@ -937,8 +933,7 @@ static int snd_echo_new_pcm(struct echoaudio *chip)
 	strcpy(pcm->name, chip->card->shortname);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &analog_playback_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &analog_capture_ops);
-	if ((err = snd_echo_preallocate_pages(pcm, snd_dma_pci_data(chip->pci))) < 0)
-		return err;
+	snd_echo_preallocate_pages(pcm, &chip->pci->dev);
 
 #ifdef ECHOCARD_HAS_DIGITAL_IO
 	/* PCM#1 Digital i/o */
@@ -951,8 +946,7 @@ static int snd_echo_new_pcm(struct echoaudio *chip)
 	strcpy(pcm->name, chip->card->shortname);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &digital_playback_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &digital_capture_ops);
-	if ((err = snd_echo_preallocate_pages(pcm, snd_dma_pci_data(chip->pci))) < 0)
-		return err;
+	snd_echo_preallocate_pages(pcm, &chip->pci->dev);
 #endif /* ECHOCARD_HAS_DIGITAL_IO */
 
 #endif /* ECHOCARD_HAS_VMIXER */
@@ -1954,7 +1948,7 @@ static int snd_echo_create(struct snd_card *card,
 
 	/* Create the DSP comm page - this is the area of memory used for most
 	of the communication with the DSP, which accesses it via bus mastering */
-	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
+	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
 				sizeof(struct comm_page),
 				&chip->commpage_dma_buf) < 0) {
 		dev_err(chip->card->dev, "cannot allocate the comm page\n");