be quicker about determining erased byte pattern when flashing

stlink-org · Feb 27, 2016 · b561d90 · b561d90
1 parent 09a8113
commit b561d90
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/src/stlink-common.c b/src/stlink-common.c
@@ -1972,11 +1972,11 @@ int stlink_fwrite_flash(stlink_t *sl, const char* path, stm32_addr_t addr) {
         ELOG("map_file() == -1\n");
         return -1;
     }
-    for(index = 0; index < mf.len; index ++) {
-        if (mf.base[index] == erased_pattern)
-            num_empty ++;
-        else
-            num_empty = 0;
+    for(index = mf.len - 1; index >= 0; index --) {
+        if (mf.base[index] != erased_pattern) {
+            break;
+        }
+        num_empty ++;
     }
     /* Round down to words */
     num_empty -= (num_empty & 3);