If the resync checkpoint for an array is at the end of the array, It doesn't
get set to MAX_SECTOR, so resyncing will be retried.  By updating curr_resync
early, this problem is fixed.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>