bootvx: Exit if bootline address is not specified

Exit the 'bootvx' command if bootline address is not specified.
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>

cmd/elf.c

@@ -304,13 +304,14 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	tmp = env_get("bootaddr");
 	if (!tmp) {
 		printf("## VxWorks bootline address not specified\n");
-	} else {
+		return 1;
+	}
+
 	bootaddr = simple_strtoul(tmp, NULL, 16);
 
 	/*
-		 * Check to see if the bootline is defined in the 'bootargs'
-		 * parameter. If it is not defined, we may be able to
-		 * construct the info.
+	 * Check to see if the bootline is defined in the 'bootargs' parameter.
+	 * If it is not defined, we may be able to construct the info.
 	 */
 	bootline = env_get("bootargs");
 	if (!bootline) {
@@ -318,16 +319,15 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		if (tmp) {
 			strcpy(build_buf, tmp);
 			ptr = strlen(tmp);
-			} else
+		} else {
 			printf("## VxWorks boot device not specified\n");
+		}
 
 		tmp = env_get("bootfile");
 		if (tmp)
-				ptr += sprintf(build_buf + ptr,
-					       "host:%s ", tmp);
+			ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
 		else
-				ptr += sprintf(build_buf + ptr,
-					       "host:vxWorks ");
+			ptr += sprintf(build_buf + ptr, "host:vxWorks ");
 
 		/*
 		 * The following parameters are only needed if 'bootdev'
@@ -367,12 +367,9 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		bootline = build_buf;
 	}
 
-		memcpy((void *)bootaddr, bootline,
-		       max(strlen(bootline), (size_t)255));
+	memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255));
 	flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
-		printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
-		       (char *)bootaddr);
-	}
+	printf("## Using bootline (@ 0x%lx): %s\n", bootaddr, (char *)bootaddr);
 
 #ifdef CONFIG_X86
 	/*