UBI fastmap updates

[Richard Weinberger]

This is the next round of UBI fastmap updates.
It fixes all issues pointed out by Shmulik. :-)

If you want to test fastmap you can use my git repo:
git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubi2.git ubi2/v17

Enjoy!
//richard

[PATCH 1/7] UBI: Fastmap: Fix lock imbalance in case of an error
[PATCH 2/7] UBI: Fastmap: Get rid of find_fastmap switch
[PATCH 3/7] UBI: Fastmap: Fix memory leak in error path
[PATCH 4/7] UBI: Fastmap: Fix double free in error path
[PATCH 5/7] UBI: Fastmap: Kerneldoc fixes
[PATCH 6/7] UBI: Fastmap: Make sure that find_wl_entry() never
[PATCH 7/7] UBI: Fastmap: Make checkpatch.pl happy