rtem Bityutskiy <Artem.Bityutskiy@nokia.com> 1287564681 +0300
committer Artem Bityutskiy <Artem.Bityutskiy@nokia.com> 1287649237 +0300

UBI: fix check_data_ff return code

When the data does not contain all 0xFF bytes, 'check_data_ff()' should return
1, not -EINVAL; Also, the caller ('process_eb()') should not add the PEB to the
"corrupted" list if there was a read error.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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