tree 8cfb20f05531dc1e83c7d295e6b59dd692bdf99d
parent 5d8c71f9e5fbdd95650be00294d238e27a363b5c
author NeilBrown <neilb@suse.de> 1324594615 +1100
committer NeilBrown <neilb@suse.de> 1324594615 +1100

md/linear: fix hot-add of devices to linear arrays.

commit d70ed2e4fafdbef0800e73942482bb075c21578b
broke hot-add to a linear array.
After that commit, metadata if not written to devices until they
have been fully integrated into the array as determined by
saved_raid_disk.  That patch arranged to clear that field after
a recovery completed.

However for linear arrays, there is no recovery - the integration is
instantaneous.  So we need to explicitly clear the saved_raid_disk
field.

Signed-off-by: NeilBrown <neilb@suse.de>