fix: Skip mkdir for FatFS root in settings API

Signed-off-by: Gopalkrishna N Biradar <[email protected]>

Author: Gopalkrishnbiradar

subsys/settings/src/settings_file.c

@@ -532,25 +532,31 @@ static int mkdir_if_not_exists(const char *path)
 
 static int mkdir_for_file(const char *file_path)
 {
-	char dir_path[SETTINGS_FILE_NAME_MAX];
-	int err;
-
-	for (size_t i = 0; file_path[i] != '\0'; i++) {
-		if (i > 0 && file_path[i] == '/') {
-			dir_path[i] = '\0';
-
-			err = mkdir_if_not_exists(dir_path);
-			if (err) {
-				return err;
-			}
-		}
-
-		dir_path[i] = file_path[i];
-	}
-
-	return 0;
+    char dir_path[SETTINGS_FILE_NAME_MAX];
+    int err;
+
+    for (size_t i = 0; file_path[i] != '\0'; i++) {
+        if (i > 0 && file_path[i] == '/') {
+            dir_path[i] = '\0';
+
+            // Skip mkdir for FatFS root directories (ending with ':')
+            if (strrchr(dir_path, ':') == &dir_path[strlen(dir_path) - 1]) {
+                LOG_DBG("FatFS root directory detected, skipping mkdir for path: %s",
+                        dir_path);
+            } else {
+                err = mkdir_if_not_exists(dir_path);
+                if (err) {
+                    return err;
+                }
+            }
+        }
+        dir_path[i] = file_path[i];
+    }
+
+    return 0;
 }
 
+
 int settings_backend_init(void)
 {
 	static struct settings_file config_init_settings_file = {