tree 7bc5702e9bdeb37699f3cce0d4641d15676e74f2
parent 33789fb9d4470e27d18596c0966339e2ca8865a9
author Artem Bityutskiy <Artem.Bityutskiy@nokia.com> 1272621753 +0300
committer Artem Bityutskiy <Artem.Bityutskiy@nokia.com> 1275640244 +0300

UBI: improve corrupted flash handling

This patch improves the way UBI handles corrupted flash, or flash
containing garbage or non-UBI data, which is the same from UBI POW.
Namely, we do the following:

* if 5% or more PEBs are corrupted, refuse the flash
* if less than 5% PEBs are corrupted, do not refuse the flash
  and format these PEBs
* if less than 8 PEBs are corrupted, format them silently, otherwise
  print a warning message.

Reported-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reviewed-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Tested-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>