[U-Boot] Porting UBI fixes (specially fastmap's) to U-Boot

[Richard Weinberger <richard@nod.at>]

Am 17.10.2015 um 20:07 schrieb Ezequiel Garcia:
> However, I'm still seeing the same warning I had before, when my partition
> is attached:
> 
> ubi0: default fastmap pool size: 200
> ubi0: default fastmap WL pool size: 100
> ubi0: attaching mtd1
> WARNING in drivers/mtd/ubi/fastmap.c line 846
> ubi0: scanning is finished
> ubi0: attached mtd1 (name "mtd=7", size 509 MiB)
> ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 129024 bytes
> ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 512
> ubi0: VID header offset: 512 (aligned 512), data offset: 2048
> ubi0: good PEBs: 4072, bad PEBs: 4, corrupted PEBs: 0
> ubi0: user volume: 4, internal volumes: 1, max. volumes count: 128
> ubi0: max/mean erase counter: 5/3, WL threshold: 4096, image sequence
> number: 2068197800
> ubi0: available PEBs: 3504, total reserved PEBs: 568, PEBs reserved
> for bad PEB handling: 76
> 
> @Richard, any ideas? Do you know which of the fixes should fix that?

As written on IRC, please try attaching _exactly_ the same image using Linux,
boot from TFTP and disable UBI in u-boot completely.
And please add debug prints to the WARN_ON(), I'd love to see which counters don't match.

Thanks,
//richard