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566c0d6a74
linux/drivers/mtd
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Roman Peniaev 566c0d6a74 mtd: mtd_blkdevs: handle REQ_FLUSH request and do explicit flush of writeback buffer 
mtd_blkdevs is device with volatile cache (writeback buffer), so it should support
REQ_FLUSH to do explicit flush.

Without this patch 'sync' does not guarantee that writeback buffer will be flushed
on disk in case of power off, e.g.:

  $ cp some_file /mnt
  $ sync

  ### POWER OFF

In case of this sequence writeback buffer will not be flushed on disk.

This patch fixes this behaviour and explicitly reports to block layer that flush
requests are being supported.

Signed-off-by: Roman Peniaev <r.peniaev@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-04-15 23:25:37 -07:00
..
chips mtd: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
devices mtd: devices: elm: update DRIVER_NAME as "omap-elm" 2014-03-25 23:09:06 -07:00
lpddr mtd: lpddr: Remove unnecessary OOM messages 2014-03-10 22:42:24 -07:00
maps mtd: allow CONFIG_MTD_PHYSMAP_OF also for CONFIG_MTD_RAM 2014-03-10 22:42:29 -07:00
nand mtd: nand: use the nand_read_subpage index everywhere 2014-04-15 23:25:36 -07:00
onenand mtd: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
tests mtd: delete non-required instances of include <linux/init.h> 2014-03-10 22:42:22 -07:00
ubi MTD updates for 3.15: 2014-04-07 10:17:30 -07:00
afs.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
ar7part.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
bcm47xxpart.c mtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X 2014-03-10 22:42:29 -07:00
bcm63xxpart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
cmdlinepart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
ftl.c
inftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
inftlmount.c mtd: delete non-required instances of include <linux/init.h> 2014-03-10 22:42:22 -07:00
Kconfig mtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X 2014-03-10 22:42:29 -07:00
Makefile
mtd_blkdevs.c mtd: mtd_blkdevs: handle REQ_FLUSH request and do explicit flush of writeback buffer 2014-04-15 23:25:37 -07:00
mtdblock_ro.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdblock.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdchar.c mtd: Fix the behavior of OTP write if there is not enough room for data 2014-03-10 22:42:31 -07:00
mtdconcat.c
mtdcore.c mtd: Fix the behavior of OTP write if there is not enough room for data 2014-03-10 22:42:31 -07:00
mtdcore.h
mtdoops.c
mtdpart.c mtd: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
mtdsuper.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdswap.c mtd: mtdswap: replace strict_strtoul() with kstrtoul() 2013-08-30 21:52:51 +01:00
nftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
nftlmount.c
ofpart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
redboot.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
rfd_ftl.c mtd: remove some duplicative checks 2014-03-10 22:42:25 -07:00
sm_ftl.c mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes() 2014-03-10 22:42:21 -07:00
sm_ftl.h
ssfdc.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00