linux.git/drivers/mtd/ubi/misc.c, branch v3.19

UBI: Extend UBI layer debug/messaging capabilities

2014-11-07T10:08:51+00:00

If there is more then one UBI device mounted, there is no way to
distinguish between messages from different UBI devices.
Add device number to all ubi layer message types.

The R/O block driver messages were replaced by pr_* since
ubi_device structure is not used by it.

Amended a bit by Artem.

Signed-off-by: Tanya Brokhman 
Signed-off-by: Artem Bityutskiy

UBI: comply with coding style

2012-09-04T06:39:01+00:00

Join all the split printk lines in order to stop checkpatch complaining.

Signed-off-by: Artem Bityutskiy

UBI: limit amount of reserved eraseblocks for bad PEB handling

2012-09-04T06:38:58+00:00

The existing mechanism of reserving PEBs for bad PEB handling has two
flaws:
- It is calculated as a percentage of good PEBs instead of total PEBs.
- There's no limit on the amount of PEBs UBI reserves for future bad
  eraseblock handling.

This patch changes the mechanism to overcome these flaws.

The desired level of PEBs reserved for bad PEB handling (beb_rsvd_level)
is set to the maximum expected bad eraseblocks (bad_peb_limit) minus the
existing number of bad eraseblocks (bad_peb_count).

The actual amount of PEBs reserved for bad PEB handling is usually set
to the desired level (but in some circumstances may be lower than the
desired level, e.g. when attaching to a device that has too few
available PEBs to satisfy the desired level).

In the case where the device has too many bad PEBs (above the expected
limit), then the desired level, and the actual amount of PEBs reserved
are set to zero. No PEBs will be set aside for future bad eraseblock
handling - even if some PEBs are made available (e.g. by shrinking a
volume).
If another PEB goes bad, and there are available PEBs, then the
eraseblock will be marked bad (consuming one available PEB). But if
there are no available PEBs, ubi will go into readonly mode.

Signed-off-by: Shmulik Ladkani

UBI: harmonize the update of ubi->beb_rsvd_pebs

2012-07-18T11:30:34+00:00

Currently, there are several locations where an attempt to reserve more
PEBs for bad PEB handling is made, with the same code being duplicated.

Harmonize it by introducing 'ubi_update_reserved()'.

Also, improve the debug message issued, making it more descriptive.

Artem: amended the patch a little.

Signed-off-by: Shmulik Ladkani 
Signed-off-by: Artem Bityutskiy

UBI: trivial: fix comment of ubi_calculate_reserved function

2012-07-18T10:33:03+00:00

The function name within the comment was not aligned with the actual
function name.

Signed-off-by: Shmulik Ladkani 
Signed-off-by: Artem Bityutskiy

mtd: utilize `mtd_is_*()' functions

2011-09-21T06:19:06+00:00

Signed-off-by: Brian Norris 
Signed-off-by: Artem Bityutskiy

UBI: make check_pattern function non-static

2010-10-19T14:19:57+00:00

This patch turns static function 'check_pattern()' into a non-static
'ubi_check_pattern()'. This is just a preparation for the chages which
are coming in the next patches.

Signed-off-by: Artem Bityutskiy

UBI: avoid unnecessary division operations

2008-07-24T10:32:54+00:00

UBI already checks that @min io size is the power of 2 at io_init.
It is save to use bit operations then.

Signed-off-by: Kyungmin Park 
Signed-off-by: Artem Bityutskiy

UBI: improve internal interfaces

2007-12-26T17:15:15+00:00

Pass volume description object to the EBA function which makes
more sense, and EBA function do not have to find the volume
description object by volume ID.

Signed-off-by: Artem Bityutskiy

UBI: use vmalloc for large buffers

2007-07-18T13:53:08+00:00

UBI allocates temporary buffers of PEB size, which may be 256KiB.
Use vmalloc instead of kmalloc for such big temporary buffers.

Signed-off-by: Artem Bityutskiy