linux-stable.git/drivers/mtd/mtdpart.c, branch linux-3.0.y

mtd: remove add_mtd_partitions, add_mtd_device and friends

2011-05-25T01:25:16+00:00

These symbols are replaced with mtd_device_register() (and removal with
mtd_device_unregister()) for public registration.

Signed-off-by: Jamie Iles 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: be silent when mtd partition parser cannot be found

2011-05-25T01:05:35+00:00

Currently when we register partitions in 'parse_mtd_partitions()' we accept the
list of parsers we should try. And if one of the parsers was not found we print
a message. Well, first of all this whole idea is bad - look at how many
'part_probes' and 'part_probe_types' variables we have - nearly every driver
defines one. Instead, we should just go through all registered parsers all the
time. But this needs to be worked on separately.

This patch makes life of MTD partitions' users a bit simpler and allows them to
safely request parsers which have not been registered -
'parse_mtd_partitions()' will not print a "not available" message in this
case.

The point is that drivers do not have to do things like this any longer:

static const char *part_probe_types[] = { "cmdlinepart", "RedBoot",
                                         "afs",
                                         NULL };

but can simply do like this:

static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs", NULL };

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: mtdpart: disallow reading OOB past the end of the partition

2011-01-17T15:25:48+00:00

This patch fixes the mtdpart bug which allows users reading OOB past the
end of the partition. This happens because 'part_read_oob()' allows reading
multiple OOB areas in one go, and mtdparts does not validate the OOB
length in the request.

Although there is such check in 'nand_do_read_oob()' in nand_base.c, but
it checks that we do not read past the flash chip, not the partition,
because in nand_base.c we work with the whole chip (e.g., mtd->size
in nand_base.c is the size of the whole chip). So this check cannot
be done correctly in nand_base.c and should be instead done in mtdparts.c.

This problem was reported by Jason Liu  and reproduced
with nandsim:

$ modprobe nandsim first_id_byte=0x20 second_id_byte=0xaa third_id_byte=0x00 \
                   fourth_id_byte=0x15 parts=0x400,0x400
$ modprobe nandsim mtd_oobtest.ko dev=0
$ dmesg
= snip =
mtd_oobtest: attempting to read past end of device
mtd_oobtest: an error is expected...
mtd_oobtest: error: read past end of device
= snip =
mtd_oobtest: finished with 2 errors

Reported-by: Jason Liu 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: initialize writebufsize in the MTD object of a partition

2011-01-06T15:35:58+00:00

Propagate the writebufsize to the partition's MTD object so
that UBI can set correct value for it's minimal I/O size
using the writebufsize field of MTD object of the partition.

By previous patches we added proper writebufsize field
initialization. Next patch can now change UBI to use
this field for setting the minimal I/O size.

Signed-off-by: Anatolij Gustschin 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: fix master device identification for mtd repartition

2010-12-03T16:32:35+00:00

Function mtd_has_master renamed as mtd_is_partition to follow the function logic.
The patch fixes the problem of checking the right mtd device for partition creation.
To delete partition checking is not needed here so as it is done in mtd_del_partition.
By master we consider the mtd device which does not belong to any partition.

Signed-off-by: Roman Tereshonkov 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: prepare partition add and del functions for ioctl requests

2010-10-24T23:47:37+00:00

mtd_is_master, mtd_add_partition and mtd_del_partition functions
are added to give the possibility of partition manipulation
by ioctl request.

The old partition add function is modified to fit the dynamic
allocation.

Signed-off-by: Roman Tereshonkov 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: Remove obsolete include

2010-08-08T20:19:42+00:00

Signed-off-by: David Woodhouse

mtd: Update copyright notices

2010-08-08T19:58:20+00:00

Signed-off-by: David Woodhouse

mtd: add an ioctl to query the lock status of a flash sector

2010-08-02T08:03:41+00:00

This patchs adds a way for user space programs to find out whether a
flash sector is locked. An optional driver method in the mtd_info struct
provides the information.

Signed-off-by: Richard Cochran 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

2009-09-20T12:55:36+00:00

Conflicts:
	drivers/mtd/mtdcore.c

Merged in order that I can apply the Nomadik nand/onenand support patches.