Commit Graph

14 Commits

Author SHA1 Message Date
Miquel Raynal
12663b442e mtd: mtd_oobtest: Handle bitflips during reads
Reads from NAND devices usually trigger bitflips, this is an expected
behavior. While bitflips are under a given threshold, the MTD core
returns 0. However, when the number of corrected bitflips is above this
same threshold, -EUCLEAN is returned to inform the upper layer that this
block is slightly dying and soon the ECC engine will be overtaken so
actions should be taken to move the data out of it.

This particular condition should not be treated like an error and the
test should continue.

Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2018-01-12 10:24:08 +01:00
Boris BREZILLON
f5b8aa78ef mtd: kill the ecclayout->oobavail field
ecclayout->oobavail is just redundant with the mtd->oobavail field.
Moreover, it prevents static const definition of ecc layouts since the
NAND framework is calculating this value based on the ecclayout->oobfree
field.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-03-07 16:23:09 -08:00
Roger Quadros
718e38b4d9 mtd: mtd_oobtest: Fix the address offset with vary_offset case
When vary_offset is set (e.g. test case 3), the offset is not always
zero so memcmpshow() will show the wrong offset in the print message.
To fix this we introduce a new function memcmpshowoffset() which takes
offset as a parameter and displays the right offset and use it in
the case where offset is non zero.

The old memcmpshow() functionality is preserved by converting it into
a macro with offset preset to 0.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-08-27 16:30:01 -07:00
Richard Weinberger
2a6a28e792 mtd: Make MTD tests cancelable
I always go nuts when I start an MTD test on a slow device and have to
wait forever until it finishes. From the debug output I already know
what the issue is but I have to wait or reset the board hard. Resetting
is often not an option (remote access, you don't want lose the current
state, etc...).

The solution is easy, check for pending signals at key positions in the
code. Using that one can even stop a test by pressing CTRL-C as
insmod/modprobe have SIGINT pending.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05 18:12:53 -07:00
Roger Quadros
d2b51c8087 mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3
In test case 3, we set vary_offset to write at different
offsets and lengths in the OOB available area. We need to
do the bitflip_limit check while checking for 0xff outside the
OOB offset + length area that we didn't modify during write.

Signed-off-by: Roger Quadros <rogerq@ti.com>
[Brian: whitespace fixup]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05 18:10:23 -07:00
Brian Norris
b9da8bae41 mtd: tests: fix more potential integer overflows
Caught by Coverity (CID #200625 and others)

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
2015-03-11 15:21:47 -07:00
Brian Norris
806b6ef567 mtd: oobtest: correct printf() format specifier for 'size_t'
Fixes warning:

   drivers/mtd/tests/oobtest.c: In function 'memcmpshow':
   drivers/mtd/tests/oobtest.c:129: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'size_t'

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Roger Quadros <rogerq@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
2014-11-20 01:26:51 -08:00
Roger Quadros
afc0ea1b8e mtd: mtd_oobtest: add bitflip_limit parameter
It is common for NAND devices to have bitflip errors.
Add a bitflip_limit parameter to specify how many bitflips per
page we can tolerate without flagging an error.
By default zero bitflips are tolerated.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-19 23:25:49 -08:00
Roger Quadros
5a66088bff mtd: mtd_oobtest: Show the verification error location and data
Add a function memcmpshow() that compares the 2 data buffers
and shows the address:offset and data bytes on comparison failure.
This function  does not break at a comparison failure but runs the
check for the whole data buffer.

Use memcmpshow() instead of memcmp() for all the verification paths.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-19 23:25:06 -08:00
Brian Norris
1001ff7a4f mtd: tests: fix integer overflow issues
These multiplications are done with 32-bit arithmetic, then converted to
64-bit. We should widen the integers first to prevent overflow. This
could be a problem for large (>4GB) MTD's.

Detected by Coverity.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
2014-08-19 11:53:08 -07:00
Akinobu Mita
be54f8f1c7 mtd: mtd_oobtest: generate consistent data for verification
mtd_oobtest writes OOB, read it back and verify.  The verification is
not correctly done if oobsize is not multiple of 4.  Although the data
to be written and the data to be compared are generated by several
prandom_byte_state() calls starting with the same seed, these two are
generated with the different size and different number of calls.

Due to the implementation of prandom_byte_state() if the size on each
call is not multiple of 4, the resulting data is not always same.

This fixes it by just calling prandom_byte_state() once and using
correct range instead of calling it multiple times for each.

Reported-by: George Cherian <george.cherian@ti.com>
Reported-by: Lothar Waßmann <LW@KARO-electronics.de>
Tested-by: Lothar Waßmann <LW@KARO-electronics.de>
Cc: George Cherian <george.cherian@ti.com>
Cc: Lothar Waßmann <LW@KARO-electronics.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-04-17 22:22:03 -07:00
Huang Shijie
818b973929 mtd: nand: add a helper to detect the nand type
This helper detects that whether the mtd's type is nand type.

Now, it's clear that the MTD_NANDFLASH stands for SLC nand only.
So use the mtd_type_is_nand() to replace the old check method
to do the nand type (include the SLC and MLC) check.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2013-10-27 16:27:06 -07:00
Akinobu Mita
4bf527aa53 mtd: mtd_oobtest: use mtd_test helpers
Use mtdtest_scan_for_bad_eraseblocks(), mtdtest_erase_good_eraseblocks(),
and mtdtest_erase_eraseblock() in mtd_test helpers.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Vikram Narayanan <vikram186@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-08-30 21:34:15 +01:00
Akinobu Mita
a995c79228 mtd: tests: rename sources in order to link a helper object
Each mtd test module have a single source whose name is the same as
the module name.  In order to link a single object including helper
functions to every test module, this rename these sources to the
different names.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Vikram Narayanan <vikram186@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-08-30 21:34:06 +01:00