ALSA: pcm: Make constraints lists const

They aren't modified by the core so the drivers can declare them const.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 3 insertions, 3 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 68372bc1e11b..e91e6047ca6f 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -810,7 +810,7 @@ int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_pa
 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 
                                unsigned int cond,
                                snd_pcm_hw_param_t var,
-                               struct snd_pcm_hw_constraint_list *l);
+                               const struct snd_pcm_hw_constraint_list *l);
 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 
                                   unsigned int cond,
                                   snd_pcm_hw_param_t var,
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 8f312fa6c282..7ae671923393 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1250,10 +1250,10 @@ static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
                                unsigned int cond,
                                snd_pcm_hw_param_t var,
-                               struct snd_pcm_hw_constraint_list *l)
+                               const struct snd_pcm_hw_constraint_list *l)
 {
         return snd_pcm_hw_rule_add(runtime, cond, var,
-                                   snd_pcm_hw_rule_list, l,
+                                   snd_pcm_hw_rule_list, (void *)l,
                                    var, -1);
 }