ALSA: pci: Constify snd_kcontrol_new items

Most of snd_kcontrol_new definitions are read-only and passed as-is.
Let's declare them as const for further optimization.

There should be no functional changes by this patch.

Link: https://lore.kernel.org/r/20200103081714.9560-38-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 14 insertions, 14 deletions

diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index b4c42c4fa201..632f7878ff3e 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -2879,7 +2879,7 @@ static int snd_hdsp_put_dds_offset(struct snd_kcontrol *kcontrol, struct snd_ctl
 	return change;
 }
 
-static struct snd_kcontrol_new snd_hdsp_9632_controls[] = {
+static const struct snd_kcontrol_new snd_hdsp_9632_controls[] = {
 HDSP_DA_GAIN("DA Gain", 0),
 HDSP_AD_GAIN("AD Gain", 0),
 HDSP_PHONE_GAIN("Phones Gain", 0),
@@ -2887,7 +2887,7 @@ HDSP_TOGGLE_SETTING("XLR Breakout Cable", HDSP_XLRBreakoutCable),
 HDSP_DDS_OFFSET("DDS Sample Rate Offset", 0)
 };
 
-static struct snd_kcontrol_new snd_hdsp_controls[] = {
+static const struct snd_kcontrol_new snd_hdsp_controls[] = {
 {
 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
@@ -3216,7 +3216,7 @@ static int snd_hdsp_info_rpm_disconnect(struct snd_kcontrol *kcontrol, struct sn
 	return snd_ctl_enum_info(uinfo, 1, 2, texts);
 }
 
-static struct snd_kcontrol_new snd_hdsp_rpm_controls[] = {
+static const struct snd_kcontrol_new snd_hdsp_rpm_controls[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "RPM Bypass",
@@ -3249,7 +3249,7 @@ static struct snd_kcontrol_new snd_hdsp_rpm_controls[] = {
 	HDSP_MIXER("Mixer", 0)
 };
 
-static struct snd_kcontrol_new snd_hdsp_96xx_aeb =
+static const struct snd_kcontrol_new snd_hdsp_96xx_aeb =
 	HDSP_TOGGLE_SETTING("Analog Extension Board",
 			HDSP_AnalogExtensionBoard);
 static struct snd_kcontrol_new snd_hdsp_adat_sync_check = HDSP_ADAT_SYNC_CHECK;
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 9e3263395f98..f926899e4755 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -4478,7 +4478,7 @@ static int snd_hdspm_put_tco_word_term(struct snd_kcontrol *kcontrol,
 
 
 
-static struct snd_kcontrol_new snd_hdspm_controls_madi[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_madi[] = {
 	HDSPM_MIXER("Mixer", 0),
 	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
 	HDSPM_SYSTEM_CLOCK_MODE("System Clock Mode", 0),
@@ -4500,7 +4500,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_madi[] = {
 };
 
 
-static struct snd_kcontrol_new snd_hdspm_controls_madiface[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_madiface[] = {
 	HDSPM_MIXER("Mixer", 0),
 	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
 	HDSPM_SYSTEM_CLOCK_MODE("System Clock Mode", 0),
@@ -4513,7 +4513,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_madiface[] = {
 	HDSPM_MADI_SPEEDMODE("MADI Speed Mode", 0)
 };
 
-static struct snd_kcontrol_new snd_hdspm_controls_aio[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_aio[] = {
 	HDSPM_MIXER("Mixer", 0),
 	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
 	HDSPM_SYSTEM_CLOCK_MODE("System Clock Mode", 0),
@@ -4554,7 +4554,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_aio[] = {
 		   */
 };
 
-static struct snd_kcontrol_new snd_hdspm_controls_raydat[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_raydat[] = {
 	HDSPM_MIXER("Mixer", 0),
 	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
 	HDSPM_SYSTEM_CLOCK_MODE("Clock Mode", 0),
@@ -4582,7 +4582,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_raydat[] = {
 	HDSPM_TOGGLE_SETTING("Single Speed WordClock Out", HDSPM_c0_Wck48)
 };
 
-static struct snd_kcontrol_new snd_hdspm_controls_aes32[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_aes32[] = {
 	HDSPM_MIXER("Mixer", 0),
 	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
 	HDSPM_SYSTEM_CLOCK_MODE("System Clock Mode", 0),
@@ -4624,7 +4624,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_aes32[] = {
 
 
 /* Control elements for the optional TCO module */
-static struct snd_kcontrol_new snd_hdspm_controls_tco[] = {
+static const struct snd_kcontrol_new snd_hdspm_controls_tco[] = {
 	HDSPM_TCO_SAMPLE_RATE("TCO Sample Rate", 0),
 	HDSPM_TCO_PULL("TCO Pull", 0),
 	HDSPM_TCO_WCK_CONVERSION("TCO WCK Conversion", 0),
@@ -4671,7 +4671,7 @@ static int snd_hdspm_create_controls(struct snd_card *card,
 	unsigned int idx, limit;
 	int err;
 	struct snd_kcontrol *kctl;
-	struct snd_kcontrol_new *list = NULL;
+	const struct snd_kcontrol_new *list = NULL;
 
 	switch (hdspm->io_type) {
 	case MADI:
diff --git a/sound/pci/rme9652/rme9652.c b/sound/pci/rme9652/rme9652.c
index 6fda027d28a4..2cb5b03f84d3 100644
--- a/sound/pci/rme9652/rme9652.c
+++ b/sound/pci/rme9652/rme9652.c
@@ -1454,7 +1454,7 @@ static int snd_rme9652_get_tc_value(void *private_data,
 
 #endif				/* ALSA_HAS_STANDARD_WAY_OF_RETURNING_TIMECODE */
 
-static struct snd_kcontrol_new snd_rme9652_controls[] = {
+static const struct snd_kcontrol_new snd_rme9652_controls[] = {
 {
 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
@@ -1509,10 +1509,10 @@ RME9652_TC_VALID("Timecode Valid", 0),
 RME9652_PASSTHRU("Passthru", 0)
 };
 
-static struct snd_kcontrol_new snd_rme9652_adat3_check =
+static const struct snd_kcontrol_new snd_rme9652_adat3_check =
 RME9652_ADAT_SYNC("ADAT3 Sync Check", 0, 2);
 
-static struct snd_kcontrol_new snd_rme9652_adat1_input =
+static const struct snd_kcontrol_new snd_rme9652_adat1_input =
 RME9652_ADAT1_IN("ADAT1 Input Source", 0);
 
 static int snd_rme9652_create_controls(struct snd_card *card, struct snd_rme9652 *rme9652)