[U-Boot] UBI problems on current u-boot

[Charles Hardin]

Part of this can be referenced by the linux commit where ECC errors are
handled as common place for MLC nand parts, and a bitflip threshold is
setup to return EUCLEAN out of the mtdcore.c. So, the work above avoids
the UBI side effect of doing the PEB relocation on getting the bit error
indication. However, the bit error is valid on these MLC parts - so, is the
idea to port the work from Linux or just make UBI read-only in U-boot
and not allow it to relocation PEBs on bit errors?

For reference the Linux commits

commit 3f91e94f7f511de74c0d2abe08672ccdbdd1961c
Author: Mike Dunn <mikedunn at newsguy.com>
Date:   Wed Apr 25 12:06:09 2012 -0700

    mtd: nand: read_page() returns max_bitflips

    ... snip so web post works ...

commit edbc4540e02c201bdd4f4d498ebb6ed517fd36e2
Author: Mike Dunn <mikedunn at newsguy.com>
Date:   Wed Apr 25 12:06:11 2012 -0700

    mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEAN

    ... snip so web post works ...

Regards,
Charles