ALSA: bt87x: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
index 099efb0..de02342 100644 (file)
--- a/sound/pci/bt87x.c
+++ b/sound/pci/bt87x.c
@@ -401,13 +401,13 @@ static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runti
 
 static int snd_bt87x_set_analog_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
 {
-       static struct snd_ratnum analog_clock = {
+       static const struct snd_ratnum analog_clock = {
                .num = ANALOG_CLOCK,
                .den_min = CLOCK_DIV_MIN,
                .den_max = CLOCK_DIV_MAX,
                .den_step = 1
        };
-       static struct snd_pcm_hw_constraint_ratnums constraint_rates = {
+       static const struct snd_pcm_hw_constraint_ratnums constraint_rates = {
                .nrats = 1,
                .rats = &analog_clock
        };