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linux/drivers/mtd
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Kamal Dasu a4bfcab309 mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program 
commit 9d2ee0a60b upstream.

On brcmnand controller v6.x and v7.x, the #WP pin is controlled through
the NAND_WP bit in CS_SELECT register.

The driver currently assumes that toggling the #WP pin is
instantaneously enabling/disabling write-protection, but it actually
takes some time to propagate the new state to the internal NAND chip
logic. This behavior is sometime causing data corruptions when an
erase/program operation is executed before write-protection has really
been disabled.

Fixes: 27c5b17cd1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller")
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-07-05 14:40:31 +02:00
..
chips mtd: cfi_cmdset_0020: Deinline do_write_buffer, save 5316 bytes 2016-07-09 18:53:33 -07:00
devices MTD updates for v4.8: 2016-08-02 17:05:11 -04:00
lpddr mtd: lpddr: show parent device in sysfs 2015-10-13 09:21:17 -07:00
maps mtd: pmcmsp: use kstrndup instead of kmalloc+strncpy 2017-03-18 19:14:28 +08:00
nand mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program 2017-07-05 14:40:31 +02:00
onenand mtd: silence some uninitialized variable warnings 2016-07-09 18:14:39 -07:00
spi-nor mtd: spi-nor: fix spansion quad enable 2017-06-29 13:00:31 +02:00
tests mtd: nandbiterrs: Support for NAND biterrors test on platforms without raw write 2016-07-11 08:40:13 +02:00
ubi ubi/upd: Always flush after prepared for an update 2017-04-27 09:10:38 +02:00
afs.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ar7part.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
bcm47xxpart.c mtd: bcm47xxpart: fix parsing first block after aligned TRX 2017-04-18 07:11:47 +02:00
bcm63xxpart.c mtd: bcm63xxpart: give width specifier an 'int', not 'size_t' 2016-03-07 13:13:58 -08:00
cmdlinepart.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ftl.c mtd: ftl: use swap() in copy_erase_unit() 2015-12-18 16:56:07 -08:00
inftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
inftlmount.c mtd: intflmount: fix off by one error in INFTL_dumpVUchains() 2014-11-05 13:19:21 -08:00
Kconfig mtd: bcm63xxpart: Remove dependency on mach-bcm63xx 2016-02-12 10:27:48 -08:00
Makefile mtd: spi-nor: shorten Kconfig naming 2014-04-14 11:23:01 -07:00
mtd_blkdevs.c block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
mtdblock.c mtd: mtdblock: remove the needless mtdblks_lock 2015-01-07 12:51:56 -08:00
mtdblock_ro.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdchar.c mtd: kill the nand_ecclayout struct 2016-05-05 23:51:51 +02:00
mtdconcat.c mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition 2016-04-19 22:05:55 +02:00
mtdcore.c treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
mtdcore.h mtd: partitions: support a cleanup callback for parsers 2015-12-09 14:57:44 -08:00
mtdoops.c mtdoops: don't erase flash at each boot 2012-11-15 15:37:51 +02:00
mtdpart.c treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
mtdsuper.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdswap.c mtd: mtdswap: remove useless if (!mtd->ecclayout) test 2016-03-07 16:23:09 -08:00
nftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
nftlmount.c mtd: nftl: reorganize operations in condition check 2015-01-09 15:26:29 -08:00
ofpart.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
redboot.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
rfd_ftl.c mtd: remove some duplicative checks 2014-03-10 22:42:25 -07:00
sm_ftl.c treewide: Fix typos in printk 2016-04-18 11:23:24 +02:00
sm_ftl.h mtd: sm_ftl: cosmetic, use bool when possible 2010-10-25 01:33:08 +01:00
ssfdc.c mtd: Replace if and BUG with BUG_ON 2016-07-09 18:48:54 -07:00