[PATCH] ASoC: Intel: mrfld: simplify sst_fill_widget_module_info

[Rasmus Villemoes]

Some tiny improvements, cutting 180 bytes off the generated code.

- use strchr() for single-character needle

- compute index using pointer subtraction instead of two strlen()
  calls

- factor out the common check for whether the initial part of
  kctl->id.name (before the space) is identical to w->name.

Signed-off-by: Rasmus Villemoes <li...@rasmusvillemoes.dk>
---
 sound/soc/intel/atom/sst-atom-controls.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/sound/soc/intel/atom/sst-atom-controls.c 
b/sound/soc/intel/atom/sst-atom-controls.c
index 90aa5c0476f3..16670feeee6a 100644
--- a/sound/soc/intel/atom/sst-atom-controls.c
+++ b/sound/soc/intel/atom/sst-atom-controls.c
@@ -1280,36 +1280,32 @@ static int sst_fill_widget_module_info(struct 
snd_soc_dapm_widget *w,
        down_read(&card->controls_rwsem);
 
        list_for_each_entry(kctl, &card->controls, list) {
-               idx = strstr(kctl->id.name, " ");
+               idx = strchr(kctl->id.name, ' ');
                if (idx == NULL)
                        continue;
-               index  = strlen(kctl->id.name) - strlen(idx);
+               index = idx - (char*)kctl->id.name;
+               if (strncmp(kctl->id.name, w->name, index))
+                       continue;
 
-               if (strstr(kctl->id.name, "Volume") &&
-                   !strncmp(kctl->id.name, w->name, index))
+               if (strstr(kctl->id.name, "Volume"))
                        ret = sst_fill_module_list(kctl, w, SST_MODULE_GAIN);
 
-               else if (strstr(kctl->id.name, "params") &&
-                        !strncmp(kctl->id.name, w->name, index))
+               else if (strstr(kctl->id.name, "params"))
                        ret = sst_fill_module_list(kctl, w, SST_MODULE_ALGO);
 
                else if (strstr(kctl->id.name, "Switch") &&
-                        !strncmp(kctl->id.name, w->name, index) &&
                         strstr(kctl->id.name, "Gain")) {
                        struct sst_gain_mixer_control *mc =
                                                (void *)kctl->private_value;
 
                        mc->w = w;
 
-               } else if (strstr(kctl->id.name, "interleaver") &&
-                        !strncmp(kctl->id.name, w->name, index)) {
+               } else if (strstr(kctl->id.name, "interleaver")) {
                        struct sst_enum *e = (void *)kctl->private_value;
 
                        e->w = w;
 
-               } else if (strstr(kctl->id.name, "deinterleaver") &&
-                        !strncmp(kctl->id.name, w->name, index)) {
-
+               } else if (strstr(kctl->id.name, "deinterleaver")) {
                        struct sst_enum *e = (void *)kctl->private_value;
 
                        e->w = w;
-- 
2.1.3

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