tools: fdtgrep: Use unsigned chars for arrays

Otherwise, values over 127 end up prefixed with ffffff.

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/tools/fdtgrep.c b/tools/fdtgrep.c
index e4112b8..db51246 100644 (file)
--- a/tools/fdtgrep.c
+++ b/tools/fdtgrep.c
@@ -213,7 +213,7 @@ static void utilfdt_print_data(const char *data, int len)
        } else {
                printf(" = [");
                for (i = 0; i < len; i++)
-                       printf("%02x%s", *p++, i < len - 1 ? " " : "");
+                       printf("%02x%s", (unsigned char)*p++, i < len - 1 ? " " : "");
                printf("]");
        }
 }