Assemble: fix assembly in the delta_disks > max_degraded case

Incremental assembly works on such an array because the kernel sees the
disk as in-sync and that the array is reshaping.  Teach Assemble() the
same assumptions.

This is only needed on kernels that do not initialize ->recovery_offset
when activating spares for reshape.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/Assemble.c b/Assemble.c
index 607f2afc..a152d656 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -868,7 +868,9 @@ int Assemble(struct supertype *st, char *mddev,
 		    devices[most_recent].i.events) {
 			devices[j].uptodate = 1;
 			if (i < content->array.raid_disks) {
-				if (devices[j].i.recovery_start == MaxSector) {
+				if (devices[j].i.recovery_start == MaxSector ||
+				    (content->reshape_active &&
+				     j >= content->array.raid_disks - content->delta_disks)) {
 					okcnt++;
 					avail[i]=1;
 				} else