From: Jonathan Liu <net147@gmail.com>
Date: Fri, 27 Sep 2013 01:30:10 +0000 (+0000)
Subject: boot-directdisk: ensure generated MBR disk signature is non-zero
X-Git-Tag: rev_ivi_2015_02_04~10838
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5174f236079b9a93c1013ea741778c43c0a8d5ec;p=scm%2Fbb%2Ftizen-distro.git

boot-directdisk: ensure generated MBR disk signature is non-zero

A zero MBR disk signature is generally seen as no signature and
another partitioning program might install a new signature.

(From OE-Core rev: b6cafb1fcd6c168f8f4a4d2d5c74f3b425f156f3)

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---

diff --git a/meta/classes/boot-directdisk.bbclass b/meta/classes/boot-directdisk.bbclass
index c58c6f0..0f64b44 100644
--- a/meta/classes/boot-directdisk.bbclass
+++ b/meta/classes/boot-directdisk.bbclass
@@ -148,7 +148,11 @@ python do_bootdirectdisk() {
 def generate_disk_signature():
     import uuid
 
-    return str(uuid.uuid4())[:8]
+    while True:
+        signature = str(uuid.uuid4())[:8]
+
+        if signature != '00000000':
+            return signature
 
 def validate_disk_signature(d):
     import re