UBI: handle bit-flips when no header found

Browse source

Currently UBI has one small flaw - when we read EC or VID header, but find only
0xFF bytes, we return UBI_IO_FF and do not report whether we had bit-flips or
not. In case of the VID header, the scanning code adds this PEB to the free list,
even though there were bit-flips.

Imagine the following situation: we start writing VID header to a PEB and have a
power cut, so the PEB becomes unstable. When we scan and read the PEB, we get
a bit-flip. Currently, UBI would just ignore this and treat the PEB as free. This
patch changes UBI behavior and now UBI will schedule this PEB for erasure.

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

...

This commit is contained in:

Artem Bityutskiy 2010-09-03 14:22:17 +03:00

parent 74d82d2660

commit 92e1a7d9e7

4 changed files with 51 additions and 27 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

54

drivers/mtd/ubi/io.c

View file

4

drivers/mtd/ubi/scan.c

View file

10

drivers/mtd/ubi/ubi.h

View file

10

drivers/mtd/ubi/wl.c

View file