ALSA: riptide: More constifications

Apply const prefix to each lbus path table definition and its
callers.

Just for minor optimization and no functional changes.

Link: https://lore.kernel.org/r/20200105144823.29547-16-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/riptide/riptide.c

@@ -361,9 +361,9 @@ enum RT_CHANNEL_IDS {
 enum { SB_CMD = 0, MODEM_CMD, I2S_CMD0, I2S_CMD1, FM_CMD, MAX_CMD };
 
 struct lbuspath {
-	unsigned char *noconv;
-	unsigned char *stereo;
-	unsigned char *mono;
+	const unsigned char *noconv;
+	const unsigned char *stereo;
+	const unsigned char *mono;
 };
 
 struct cmdport {
@@ -464,7 +464,7 @@ struct sgd {			/* scatter gather desriptor */
 
 struct pcmhw {			/* pcm descriptor */
 	struct lbuspath paths;
-	unsigned char *lbuspath;
+	const unsigned char *lbuspath;
 	unsigned char source;
 	unsigned char intdec[2];
 	unsigned char mixer;
@@ -517,7 +517,7 @@ MODULE_DEVICE_TABLE(pci, snd_riptide_ids);
 /*
  */
 
-static unsigned char lbusin2out[E2SINK_MAX + 1][2] = {
+static const unsigned char lbusin2out[E2SINK_MAX + 1][2] = {
 	{NO_OUT, LS_NONE1}, {NO_OUT, LS_NONE2}, {NO_OUT, LS_NONE1}, {NO_OUT,
 								     LS_NONE2},
 	{NO_OUT, LS_NONE1}, {NO_OUT, LS_NONE2}, {NO_OUT, LS_NONE1}, {NO_OUT,
@@ -557,63 +557,63 @@ static unsigned char lbusin2out[E2SINK_MAX + 1][2] = {
 								     LS_NONE2},
 };
 
-static unsigned char lbus_play_opl3[] = {
+static const unsigned char lbus_play_opl3[] = {
 	DIGITAL_MIXER_IN0 + FM_MIXER, 0xff
 };
-static unsigned char lbus_play_modem[] = {
+static const unsigned char lbus_play_modem[] = {
 	DIGITAL_MIXER_IN0 + MODEM_MIXER, 0xff
 };
-static unsigned char lbus_play_i2s[] = {
+static const unsigned char lbus_play_i2s[] = {
 	INTER0_IN + I2S_INTDEC, DIGITAL_MIXER_IN0 + I2S_MIXER, 0xff
 };
-static unsigned char lbus_play_out[] = {
+static const unsigned char lbus_play_out[] = {
 	PDAC2ACLNK, 0xff
 };
-static unsigned char lbus_play_outhp[] = {
+static const unsigned char lbus_play_outhp[] = {
 	HNDSPK2ACLNK, 0xff
 };
-static unsigned char lbus_play_noconv1[] = {
+static const unsigned char lbus_play_noconv1[] = {
 	DIGITAL_MIXER_IN0, 0xff
 };
-static unsigned char lbus_play_stereo1[] = {
+static const unsigned char lbus_play_stereo1[] = {
 	INTER0_IN, DIGITAL_MIXER_IN0, 0xff
 };
-static unsigned char lbus_play_mono1[] = {
+static const unsigned char lbus_play_mono1[] = {
 	INTERM0_IN, DIGITAL_MIXER_IN0, 0xff
 };
-static unsigned char lbus_play_noconv2[] = {
+static const unsigned char lbus_play_noconv2[] = {
 	DIGITAL_MIXER_IN1, 0xff
 };
-static unsigned char lbus_play_stereo2[] = {
+static const unsigned char lbus_play_stereo2[] = {
 	INTER1_IN, DIGITAL_MIXER_IN1, 0xff
 };
-static unsigned char lbus_play_mono2[] = {
+static const unsigned char lbus_play_mono2[] = {
 	INTERM1_IN, DIGITAL_MIXER_IN1, 0xff
 };
-static unsigned char lbus_play_noconv3[] = {
+static const unsigned char lbus_play_noconv3[] = {
 	DIGITAL_MIXER_IN2, 0xff
 };
-static unsigned char lbus_play_stereo3[] = {
+static const unsigned char lbus_play_stereo3[] = {
 	INTER2_IN, DIGITAL_MIXER_IN2, 0xff
 };
-static unsigned char lbus_play_mono3[] = {
+static const unsigned char lbus_play_mono3[] = {
 	INTERM2_IN, DIGITAL_MIXER_IN2, 0xff
 };
-static unsigned char lbus_rec_noconv1[] = {
+static const unsigned char lbus_rec_noconv1[] = {
 	LBUS2ARM_FIFO5, 0xff
 };
-static unsigned char lbus_rec_stereo1[] = {
+static const unsigned char lbus_rec_stereo1[] = {
 	DECIM0_IN, LBUS2ARM_FIFO5, 0xff
 };
-static unsigned char lbus_rec_mono1[] = {
+static const unsigned char lbus_rec_mono1[] = {
 	DECIMM3_IN, LBUS2ARM_FIFO5, 0xff
 };
 
-static unsigned char play_ids[] = { 4, 1, 2, };
-static unsigned char play_sources[] = {
+static const unsigned char play_ids[] = { 4, 1, 2, };
+static const unsigned char play_sources[] = {
 	ARM2LBUS_FIFO4, ARM2LBUS_FIFO1, ARM2LBUS_FIFO2,
 };
-static struct lbuspath lbus_play_paths[] = {
+static const struct lbuspath lbus_play_paths[] = {
 	{
 	 .noconv = lbus_play_noconv1,
 	 .stereo = lbus_play_stereo1,
@@ -737,7 +737,7 @@ static int loadfirmware(struct cmdif *cif, const unsigned char *img,
 
 static void
 alloclbuspath(struct cmdif *cif, unsigned char source,
-	      unsigned char *path, unsigned char *mixer, unsigned char *s)
+	      const unsigned char *path, unsigned char *mixer, unsigned char *s)
 {
 	while (*path != 0xff) {
 		unsigned char sink, type;
@@ -765,7 +765,7 @@ alloclbuspath(struct cmdif *cif, unsigned char source,
 			}
 		}
 		if (*path++ & SPLIT_PATH) {
-			unsigned char *npath = path;
+			const unsigned char *npath = path;
 
 			while (*npath != 0xff)
 				npath++;
@@ -775,7 +775,7 @@ alloclbuspath(struct cmdif *cif, unsigned char source,
 }
 
 static void
-freelbuspath(struct cmdif *cif, unsigned char source, unsigned char *path)
+freelbuspath(struct cmdif *cif, unsigned char source, const unsigned char *path)
 {
 	while (*path != 0xff) {
 		unsigned char sink;
@@ -787,7 +787,7 @@ freelbuspath(struct cmdif *cif, unsigned char source, unsigned char *path)
 			source = lbusin2out[sink][0];
 		}
 		if (*path++ & SPLIT_PATH) {
-			unsigned char *npath = path;
+			const unsigned char *npath = path;
 
 			while (*npath != 0xff)
 				npath++;
@@ -1441,7 +1441,7 @@ static int snd_riptide_prepare(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct pcmhw *data = get_pcmhwdev(substream);
 	struct cmdif *cif = chip->cif;
-	unsigned char *lbuspath = NULL;
+	const unsigned char *lbuspath = NULL;
 	unsigned int rate, channels;
 	int err = 0;
 	snd_pcm_format_t format;