linux.git/drivers/mtd/ubi, branch v2.6.31

UBI: compatible fallback in absense of sequence numbers

2009-07-24T17:08:52+00:00

Fall back onto thinking everything's OK if either of the sequence
numbers we are asked to compare is zero, which is what was used
before sequence numbers were introduced.

[ Artem: modified the patch to be applicable to upstream UBI, added
        big comment ]

Signed-off-by: Adrian Hunter 
Signed-off-by: Phil Carmody 
Signed-off-by: Artem Bityutskiy

UBI: fix double free on error path

2009-07-24T17:08:52+00:00

If we fail in 'ubi_eba_init_scan()', we free
'ubi->volumes[i]->eba_tbl' in there, but also later free it
in 'free_internal_volumes()'. Fix this by assigning NULL
to 'ubi->volumes[i]->eba_tbl' after it is freed.

Signed-off-by: Adrian Hunter 
Signed-off-by: Artem Bityutskiy

UBI: fix bug in image sequence number handling

2009-07-15T08:30:59+00:00

This patch fixes a bug in the image seq. number handling in the
scanning level. The assignment of the image_seq was incorrect.

Signed-off-by: Holger Brunck 
Signed-off-by: Artem Bityutskiy

UBI: gluebi: initialize ubi_num field

2009-07-15T08:30:55+00:00

Do not forget to initialize 'gluebi->ubi_num' because otherwise
it will stay 0 even for ubi1 device, and gluebi will open
wrong UBI device when 'gluebi_get_device()' is called.

Signed-off-by: Artem Bityutskiy

UBI: fix compilation warnings

2009-07-08T07:15:41+00:00

The recent "UBI: fix NOR flash recovery" introduced compilation
warnings which were immediately spotted by our linux-next keeper.
This patch fixes them.

Reported-by: Stephen Rothwell 
Signed-off-by: Artem Bityutskiy

UBI: fix NOR flash recovery

2009-07-07T08:37:45+00:00

This commit fixes NOR flash recovery issues observed with Spansion
S29GL512N NOR.

When NOR erases, it first fills PEBs with zeroes, then sets all bytes
to 0xFF. Filling with zeroes starts from the end of the PEB. And when
power is cut, this results in PEBs containing correct EC and VID headers
but corrupted with zeros at the end. This confuses UBI and it mistakinly
accepts these PEBs and associate them with LEBs.

Fis this issue by zeroing EC and VID magics before erasing PEBs, to
make UBI later refuse zem.

Signed-off-by: Artem Bityutskiy

UBI: nicify image sequence number handling

2009-07-05T15:47:08+00:00

Move the image seq. number handling from I/O level to the scanning
lever, where it really belongs to. Move the @image_seq_set variable
to the @struct ubi_scan_info structure, which exists only during
scanning.

Signed-off-by: Artem Bityutskiy

UBI: add image sequence number to EC header

2009-07-05T15:47:07+00:00

An image sequence number is added to the UBI erase-counter header
to be able determine if the root file system contains a mixture
of old and new images (because the flashing failed to complete).

A change to nolo is also needed for this to take effect.

Signed-off-by: Adrian Hunter 
Signed-off-by: Artem Bityutskiy

UBI: remove bogus debugging checks

2009-07-05T15:47:05+00:00

The 'paranoid_check_empty()' is bogus because, which is easilly
seen on NOR flash, which has long erase cycles, and which may
easilly end-up with half-erased eraseblocks. In this case the
paranoid check fails. I is just wrong to assume that PEBs which
do not have EC headers always contain all 0xFF. Such assumption
should not be made on the I/O level, which is quite low.

Thus, just kill the check.

Signed-off-by: Artem Bityutskiy

UBI: add empty eraseblocks verification

2009-07-05T15:47:03+00:00

This patch adds code which makes sure eraseblocks contain all 0xFF
bytes before starting using them. The verification is done only when
debugging checks are enabled.

Signed-off-by: Artem Bityutskiy