From 50b9c10da0e7c153744b548680147dc8cc7c4c72 Mon Sep 17 00:00:00 2001
From: Pawel Baldysiak <pawel.baldysiak@intel.com>
Date: Thu, 28 Sep 2017 14:41:15 +0200
Subject: [PATCH 09/12] imsm: Write empty PPL header if assembling
 regular clean array.

If array was initially assembled with kernel without PPL support -
initial header was never written to the drive.
If initial resync was completed and system is rebooted to kernel with
PPL support - mdadm prevents from assembling normal clean array
due to lack of valid PPL.
Write empty header when assemble normal clean array, so the
its assamble is no longer blocked.

Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 super-intel.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/super-intel.c b/super-intel.c
index 7b2327b..501d0c3 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -6225,7 +6225,9 @@ out:
 	}
 
 	if (ret == 1) {
-		if (map->map_state == IMSM_T_STATE_UNINITIALIZED)
+		if (map->map_state == IMSM_T_STATE_UNINITIALIZED ||
+		   (map->map_state == IMSM_T_STATE_NORMAL &&
+		   !(dev->vol.dirty & RAIDVOL_DIRTY)))
 			ret = st->ss->write_init_ppl(st, info, d->fd);
 		else
 			info->mismatch_cnt++;
-- 
2.7.4