ALSA: trident: Remove always NULL parameters

The various PCM allocation functions in this driver take a pointer to a
pointer of a PCM where if this parameter is provided the newly allocated PCM
is stored. All callers pass NULL though, so remove the parameter.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/trident/trident.c

@@ -127,21 +127,21 @@ static int snd_trident_probe(struct pci_dev *pci,
 	sprintf(card->longname, "%s PCI Audio at 0x%lx, irq %d",
 		card->shortname, trident->port, trident->irq);
 
-	if ((err = snd_trident_pcm(trident, pcm_dev++, NULL)) < 0) {
+	if ((err = snd_trident_pcm(trident, pcm_dev++)) < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	switch (trident->device) {
 	case TRIDENT_DEVICE_ID_DX:
 	case TRIDENT_DEVICE_ID_NX:
-		if ((err = snd_trident_foldback_pcm(trident, pcm_dev++, NULL)) < 0) {
+		if ((err = snd_trident_foldback_pcm(trident, pcm_dev++)) < 0) {
 			snd_card_free(card);
 			return err;
 		}
 		break;
 	}
 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018) {
-		if ((err = snd_trident_spdif_pcm(trident, pcm_dev++, NULL)) < 0) {
+		if ((err = snd_trident_spdif_pcm(trident, pcm_dev++)) < 0) {
 			snd_card_free(card);
 			return err;
 		}

sound/pci/trident/trident.h

@@ -420,9 +420,9 @@ int snd_trident_create(struct snd_card *card,
 		       struct snd_trident ** rtrident);
 int snd_trident_create_gameport(struct snd_trident *trident);
 
-int snd_trident_pcm(struct snd_trident * trident, int device, struct snd_pcm **rpcm);
-int snd_trident_foldback_pcm(struct snd_trident * trident, int device, struct snd_pcm **rpcm);
-int snd_trident_spdif_pcm(struct snd_trident * trident, int device, struct snd_pcm **rpcm);
+int snd_trident_pcm(struct snd_trident *trident, int device);
+int snd_trident_foldback_pcm(struct snd_trident *trident, int device);
+int snd_trident_spdif_pcm(struct snd_trident *trident, int device);
 int snd_trident_attach_synthesizer(struct snd_trident * trident);
 struct snd_trident_voice *snd_trident_alloc_voice(struct snd_trident * trident, int type,
 					     int client, int port);

sound/pci/trident/trident_main.c

@@ -2172,14 +2172,11 @@ static struct snd_pcm_ops snd_trident_spdif_7018_ops = {
   
   ---------------------------------------------------------------------------*/
 
-int snd_trident_pcm(struct snd_trident *trident,
-		    int device, struct snd_pcm **rpcm)
+int snd_trident_pcm(struct snd_trident *trident, int device)
 {
 	struct snd_pcm *pcm;
 	int err;
 
-	if (rpcm)
-		*rpcm = NULL;
 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, trident->ChanPCM, 1, &pcm)) < 0)
 		return err;
 
@@ -2214,8 +2211,6 @@ int snd_trident_pcm(struct snd_trident *trident,
 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
 	}
 
-	if (rpcm)
-		*rpcm = pcm;
 	return 0;
 }
 
@@ -2230,16 +2225,13 @@ int snd_trident_pcm(struct snd_trident *trident,
   
   ---------------------------------------------------------------------------*/
 
-int snd_trident_foldback_pcm(struct snd_trident *trident,
-			     int device, struct snd_pcm **rpcm)
+int snd_trident_foldback_pcm(struct snd_trident *trident, int device)
 {
 	struct snd_pcm *foldback;
 	int err;
 	int num_chan = 3;
 	struct snd_pcm_substream *substream;
 
-	if (rpcm)
-		*rpcm = NULL;
 	if (trident->device == TRIDENT_DEVICE_ID_NX)
 		num_chan = 4;
 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, 0, num_chan, &foldback)) < 0)
@@ -2271,8 +2263,6 @@ int snd_trident_foldback_pcm(struct snd_trident *trident,
 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV,
 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
 
-	if (rpcm)
-		*rpcm = foldback;
 	return 0;
 }
 
@@ -2287,14 +2277,11 @@ int snd_trident_foldback_pcm(struct snd_trident *trident,
   
   ---------------------------------------------------------------------------*/
 
-int snd_trident_spdif_pcm(struct snd_trident *trident,
-			  int device, struct snd_pcm **rpcm)
+int snd_trident_spdif_pcm(struct snd_trident *trident, int device)
 {
 	struct snd_pcm *spdif;
 	int err;
 
-	if (rpcm)
-		*rpcm = NULL;
 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx IEC958", device, 1, 0, &spdif)) < 0)
 		return err;
 
@@ -2310,8 +2297,6 @@ int snd_trident_spdif_pcm(struct snd_trident *trident,
 
 	snd_pcm_lib_preallocate_pages_for_all(spdif, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
 
-	if (rpcm)
-		*rpcm = spdif;
 	return 0;
 }