1 files changed, 7 insertions, 5 deletions

diff --git a/miscutils/ubi_tools.c b/miscutils/ubi_tools.c
index d9b76b69c..494718ccf 100644
--- a/miscutils/ubi_tools.c
+++ b/miscutils/ubi_tools.c
@@ -298,7 +298,7 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
         } else
 
 //usage:#define ubiupdatevol_trivial_usage
-//usage:       "[-t | [-s SIZE] IMG_FILE] UBI_DEVICE"
+//usage:       "-t UBI_DEVICE | [-s SIZE] UBI_DEVICE IMG_FILE"
 //usage:#define ubiupdatevol_full_usage "\n\n"
 //usage:       "Update UBI volume\n"
 //usage:     "\n        -t      Truncate to zero size"
@@ -313,7 +313,6 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
                         xioctl(fd, UBI_IOCVOLUP, &bytes64);
                 }
                 else {
-                        struct stat st;
                         unsigned ubinum, volnum;
                         unsigned leb_size;
                         ssize_t len;
@@ -327,12 +326,15 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
                         sprintf(path_sys_class_ubi_ubi, "%u_%u/usable_eb_size", ubinum, volnum);
                         leb_size = get_num_from_file(path, MAX_SANE_ERASEBLOCK, "Can't get usable eraseblock size from '%s'");
 
-                        if (!(opts & OPTION_s)) {
+                        if (!(opts & OPTION_t)) {
                                 if (!*argv)
                                         bb_show_usage();
                                 xmove_fd(xopen(*argv, O_RDONLY), STDIN_FILENO);
-                                xfstat(STDIN_FILENO, &st, *argv);
-                                size_bytes = st.st_size;
+                                if (!(opts & OPTION_s)) {
+                                        struct stat st;
+                                        xfstat(STDIN_FILENO, &st, *argv);
+                                        size_bytes = st.st_size;
+                                }
                         }
 
                         bytes64 = size_bytes;