ALSA: usx2y: More constifications

Apply const prefix to each possible place: the string array and the
parameter tables and callers.

Just for minor optimization and no functional changes.

Link: https://lore.kernel.org/r/20200105144823.29547-23-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index 0e6d82b5778e07907704b1b8ab493266a7258569..22412cd69e98588ece0e0cfea4131e5460cb1a19 100644 (file)
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -94,7 +94,7 @@ static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll
 static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
                                      struct snd_hwdep_dsp_status *info)
 {
-       static char *type_ids[USX2Y_TYPE_NUMS] = {
+       static const char * const type_ids[USX2Y_TYPE_NUMS] = {
                [USX2Y_TYPE_122] = "us122",
                [USX2Y_TYPE_224] = "us224",
                [USX2Y_TYPE_428] = "us428",

diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index c7dbc0f94efb368c781e91bf8ccba50d4ef1d98d..772f6f3ccbb11cde6a5d18de8f7072b7e0c29fbc 100644 (file)
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -549,7 +549,7 @@ static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
  * if sg buffer is supported on the later version of alsa, we'll follow
  * that.
  */
-static struct s_c2
+static const struct s_c2
 {
        char c1, c2;
 }
@@ -589,7 +589,7 @@ static struct s_c2
        { 0x18, 0x7C},
        { 0x18, 0x7E}
 };
-static struct s_c2 SetRate48000[] =
+static const struct s_c2 SetRate48000[] =
 {
        { 0x14, 0x09},  // this line sets 48000, well actually a little less
        { 0x18, 0x40},  // only tascam / frontier design knows the further lines .......
@@ -642,7 +642,7 @@ static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
        int                     err = 0, i;
        struct snd_usX2Y_urbSeq *us = NULL;
        int                     *usbdata = NULL;
-       struct s_c2             *ra = rate == 48000 ? SetRate48000 : SetRate44100;
+       const struct s_c2       *ra = rate == 48000 ? SetRate48000 : SetRate44100;
 
        if (usX2Y->rate != rate) {
                us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);