commit 8a0ea6e12b379216e6c498ec15d480cf95e9bbe4
Author: Than Ngo <than@redhat.com>
Date:   Tue Feb 25 12:14:00 2020 +0100

    update_flash_nv: fixup null byte command substitution warning

diff --git a/scripts/update_flash_nv b/scripts/update_flash_nv
index bb9dfee..8be9e8e 100755
--- a/scripts/update_flash_nv
+++ b/scripts/update_flash_nv
@@ -313,7 +313,7 @@ fsp_validate_flash() {
 	echo 1 > $SYS_VALIDATE_FLASH 2>/dev/null
 
 	# Display appropriate message, exiting if necessary
-	output="$(cat $SYS_VALIDATE_FLASH)"
+	output="$(tr -d '\0' < $SYS_VALIDATE_FLASH)"
 	fsp_echo_validate_return_status "$output"
 }