staging: most: replace multiple if..else with table lookup

Replace multiple if..else if..statements with simple table lookup in two
functions.

Signed-off-by: Hari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/most/mostcore/core.c b/drivers/staging/most/mostcore/core.c
index e4797fd..ab4c32d 100644 (file)
--- a/drivers/staging/most/mostcore/core.c
+++ b/drivers/staging/most/mostcore/core.c
@@ -79,6 +79,14 @@ struct most_inst_obj {
        struct list_head list;
 };
 
+static const struct {
+       int most_ch_data_type;
+       char *name;
+} ch_data_type[] = { { MOST_CH_CONTROL, "control\n" },
+       { MOST_CH_ASYNC, "async\n" },
+       { MOST_CH_SYNC, "sync\n" },
+       { MOST_CH_ISOC_AVP, "isoc_avp\n"} };
+
 #define to_inst_obj(d) container_of(d, struct most_inst_obj, kobj)
 
 /**
@@ -409,14 +417,12 @@ static ssize_t show_set_datatype(struct most_c_obj *c,
                                 struct most_c_attr *attr,
                                 char *buf)
 {
-       if (c->cfg.data_type & MOST_CH_CONTROL)
-               return snprintf(buf, PAGE_SIZE, "control\n");
-       else if (c->cfg.data_type & MOST_CH_ASYNC)
-               return snprintf(buf, PAGE_SIZE, "async\n");
-       else if (c->cfg.data_type & MOST_CH_SYNC)
-               return snprintf(buf, PAGE_SIZE, "sync\n");
-       else if (c->cfg.data_type & MOST_CH_ISOC_AVP)
-               return snprintf(buf, PAGE_SIZE, "isoc_avp\n");
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(ch_data_type); i++) {
+               if (c->cfg.data_type & ch_data_type[i].most_ch_data_type)
+                       return snprintf(buf, PAGE_SIZE, ch_data_type[i].name);
+       }
        return snprintf(buf, PAGE_SIZE, "unconfigured\n");
 }
 
@@ -425,15 +431,16 @@ static ssize_t store_set_datatype(struct most_c_obj *c,
                                  const char *buf,
                                  size_t count)
 {
-       if (!strcmp(buf, "control\n")) {
-               c->cfg.data_type = MOST_CH_CONTROL;
-       } else if (!strcmp(buf, "async\n")) {
-               c->cfg.data_type = MOST_CH_ASYNC;
-       } else if (!strcmp(buf, "sync\n")) {
-               c->cfg.data_type = MOST_CH_SYNC;
-       } else if (!strcmp(buf, "isoc_avp\n")) {
-               c->cfg.data_type = MOST_CH_ISOC_AVP;
-       } else {
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(ch_data_type); i++) {
+               if (!strcmp(buf, ch_data_type[i].name)) {
+                       c->cfg.data_type = ch_data_type[i].most_ch_data_type;
+                       break;
+               }
+       }
+
+       if (i == ARRAY_SIZE(ch_data_type)) {
                pr_info("WARN: invalid attribute settings\n");
                return -EINVAL;
        }