FAILED: patch "[PATCH] ubi: Fix Fastmap's update_vol()" failed to apply to 4.4-stable tree

The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Richard Weinberger <[email protected]>
Date: Wed, 24 Aug 2016 14:36:15 +0200
Subject: [PATCH] ubi: Fix Fastmap's update_vol()

Usually Fastmap is free to consider every PEB in one of the pools as newer than the existing PEB. Since PEBs in a pool are by definition newer than everything else.
But update_vol() missed the case that a pool can contain more than one candidate.

index 8bd468332ec0..d6384d965788 100644
@@ -304,6 +304,7 @@ static int update_vol(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			aeb->pnum = new_aeb->pnum;
 			aeb->copy_flag = new_vh->copy_flag;
 			aeb->scrub = new_aeb->scrub;
+			aeb->sqnum = new_aeb->sqnum;
 			ubi_free_aeb(ai, new_aeb);
 
 		/* new_aeb is older */