Commit Graph

33 Commits

Author SHA1 Message Date
Colin Ian King
bf6571057f mtd: mtdswap: make array 'name' static const, shrinks object size
Don't populate the read-only array 'name' on the stack but instead
make it static and constify it. Makes the object code smaller by 35
bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  26304	   4444	    352	  31100	   797c	drivers/mtd/mtdswap.o

After:
   text	   data	    bss	    dec	    hex	filename
  26205	   4508	    352	  31065	   7959	drivers/mtd/mtdswap.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-12-16 21:30:08 +01:00
Arvind Yadav
a5929b64fa mtd: mtdswap: fix spelling mistake: 'TRESHOLD' -> 'THRESHOLD'
Trivial fix to spelling mistakes.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-11-13 21:39:16 +01:00
Brian Norris
1fbef470f3 mtd: mtdswap: remove unused variables 'dev' and 'gd'
This was changed recently (commit e8e3edb95c ("mtd: create per-device
and module-scope debugfs entries")) and some compilers are complaining:

   drivers//mtd/mtdswap.c: In function 'mtdswap_add_debugfs':
>> drivers//mtd/mtdswap.c:1317: warning: unused variable 'dev'

And once we kill 'dev', 'gd' is also unused.

Cc: Mario J. Rugiero <mrugiero@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-07-24 17:04:33 -07:00
Mario Rugiero
e8e3edb95c mtd: create per-device and module-scope debugfs entries
Several MTD devices are using debugfs entries created in the root.
This commit provides the means for a standardized subtree, creating
one "mtd" entry at root, and one entry per device inside it, named
after the device.
The tree is registered in add_mtd_device, and released in
del_mtd_device.
Devices docg3, mtdswap and nandsim were updated to use this subtree
instead of custom ones, and their entries were prefixed with the
drivers' names.

Signed-off-by: Mario J. Rugiero <mrugiero@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-07-21 13:25:29 -07:00
Geliang Tang
e4a8aad8e0 mtd: mtdswap: use MTDSWAP_ECNT_MIN/MAX
Since macros MTDSWAP_ECNT_MIN() and MTDSWAP_ECNT_MAX() have been
defined in mtdswap.c, use them instead of open-coding.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-04-19 13:12:02 -07:00
Colin Ian King
b2c4ba5cf7 mtd: mtdswap: fix spelling mistake "erassure" -> "erasure"
Trivial fix to spelling mistake in dev_err message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
[Brian: add EOL newline]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2016-11-22 11:43:52 -08:00
Boris BREZILLON
f2de0fa643 mtd: mtdswap: remove useless if (!mtd->ecclayout) test
If the MTD device does not have OOB, the mtd->oobsize and mtd->oobavail
fields are set to zero, and we are testing those values in the following
test.
Remove the useless if (!mtd->ecclayout) test.

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
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
Brian Norris
31f754628c mtd: use __packed shorthand
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-08-19 11:53:08 -07:00
Brian Norris
8c3f3f1d79 mtd: mtdswap: fix integer overflow
Caught by Coverity.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-08-19 11:53:08 -07:00
Samarth Parikh
6f3c0f1631 mtd: Fixed checkpatch seq_printf warnings
Fixed checkpatch warnings: "WARNING: Prefer seq_puts to seq_printf"

This patch is created with reference to the ongoing lkml thread
https://lkml.org/lkml/2014/7/15/646
where Andrew Morton wrote:

"
- puts is presumably faster

- puts doesn't go rogue if you accidentally pass it a "%".

- this patch would actually make compiled object files few bytes smaller.
  Perhaps because seq_printf() is a varargs function, forcing the
  caller to pass args on the stack instead of in registers.
"

Signed-off-by: Samarth Parikh <samarthp@ymail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-08-19 11:53:07 -07:00
Jingoo Han
3156231fb6 mtd: mtdswap: replace strict_strtoul() with kstrtoul()
The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-08-30 21:52:51 +01:00
Artem Bityutskiy
800ffd3496 mtd: do not use mtd->block_markbad directly
Instead, use the new 'mtd_can_have_bb()', or just rely on 'mtd_block_markbad()'
return code, which will be -EOPNOTSUPP if bad blocks are not supported.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:26:26 +00:00
Artem Bityutskiy
8f461a7302 mtd: introduce mtd_can_have_bb helper
This patch introduces new 'mtd_can_have_bb()' helper function which checks
whether the flash can have bad eraseblocks. Then it changes all the
direct 'mtd->block_isbad' use cases with 'mtd_can_have_bb()'.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:26:24 +00:00
Artem Bityutskiy
327cf2922b mtd: do not use mtd->sync directly
This patch teaches 'mtd_sync()' to do nothing when the MTD driver does
not have the '->sync()' method, which allows us to remove all direct
'mtd->sync' accesses.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:26:21 +00:00
Artem Bityutskiy
5942ddbc50 mtd: introduce mtd_block_markbad interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:48 +00:00
Artem Bityutskiy
7086c19d07 mtd: introduce mtd_block_isbad interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:47 +00:00
Artem Bityutskiy
85f2f2a809 mtd: introduce mtd_sync interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:35 +00:00
Artem Bityutskiy
a2cc5ba075 mtd: introduce mtd_write_oob interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:24 +00:00
Artem Bityutskiy
fd2819bbc9 mtd: introduce mtd_read_oob interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:23 +00:00
Artem Bityutskiy
eda95cbf75 mtd: introduce mtd_write interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:20 +00:00
Artem Bityutskiy
329ad399a9 mtd: introduce mtd_read interface
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:19 +00:00
Artem Bityutskiy
7e1f0dc055 mtd: introduce mtd_erase interface
This patch is part of a patch-set which changes the MTD interface
from 'mtd->func()' form to 'mtd_func()' form. We need this because
we want to add common code to to all drivers in the mtd core level,
which is impossible with the current interface when MTD clients
call driver functions like 'read()' or 'write()' directly.

At this point we just introduce a new inline wrapper function, but
later some of them are expected to gain more code. E.g., the input
parameters check should be moved to the wrappers rather than be
duplicated at many drivers.

This particular patch introduced the 'mtd_erase()' interface. The
following patches add all the other interfaces one by one.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-01-09 18:25:11 +00:00
Brian Norris
d57f40544a mtd: utilize `mtd_is_*()' functions
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-09-21 09:19:06 +03:00
Brian Norris
0612b9ddc2 mtd: rename MTD_OOB_* to MTD_OPS_*
These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW
affected operations on in-band page data as well. To clarify these
options and to emphasize that their effect is applied per-operation, we
change the primary prefix to MTD_OPS_.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-09-11 15:28:59 +03:00
Brian Norris
92394b5c2b mtd: spelling fixes
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-09-11 15:02:16 +03:00
Joe Perches
1712cde285 mtd: convert vmalloc/memset to vzalloc
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-08-15 13:26:37 +03:00
Maxin B. John
8d8f26e19c mtd: mtdswap: fix possible null dereference
This patch fixes the possible null dereference of the variable "oinfo"
Thanks to Coverity for spotting this.

Signed-off-by: Maxin B. John <john.maxin@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-05-25 02:11:44 +01:00
Randy Dunlap
2130ad32a0 mtd: mtdswap: fix printk format warning
The number is actually a sizeof(), so using %zu for it builds
cleanly on 32-bit or 64-bit.

drivers/mtd/mtdswap.c:1456: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'unsigned int'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-04-01 16:44:31 +03:00
Artem Bityutskiy
68b1a1e786 mtd: mtdswap: fix compilation warning
Fix the following compilation warning:

drivers/mtd/mtdswap.c: In function ‘mtdswap_pick_gc_eblk’:
drivers/mtd/mtdswap.c:859: warning: ‘idx’ may be used uninitialized in this function
drivers/mtd/mtdswap.c:859: note: ‘idx’ was declared here

Initialize idx to -1 because this value means "no tree choosen".

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-03-25 17:10:16 +02:00
Yang Ruirui
e21fa86ad0 mtdswap: kill strict error handling option
As Artem Bityutskiy suggested: this option is controversial, as we
do not really have any prove it is useful. And it is too much to have
it as a config parameter. So, better kill it and let the real mtdswap
users decide whether it is needed or not.

Signed-off-by: Yang Ruirui<ruirui.r.yang@tieto.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-03-25 17:04:18 +02:00
David Woodhouse
89d8d32060 mtd: fix printf format warnings, mostly lack of %zd for size_t, in mtdswap
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-03-11 15:17:41 +00:00
Jarkko Lavinen
a321590246 mtd: Add mtdswap block driver
Add a driver for allowing an mtd device to be used as a block device for
swapping. The block device is volatile, and the mapping of swapped pages
is not stored on flash.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-03-11 14:22:46 +00:00