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03d3a1df6d
linux/drivers/mtd
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Cooper Jr., Franklin 03d3a1df6d mtd: nand: omap2: Start dma request before enabling prefetch 
The prefetch engine sends a dma request once a FIFO threshold has
been met. No other requests are received until the previous request
is handled.

Starting a dma transfer (dma_async_issue_pending) results in any
previous event for the dma channel to be cleared. Therefore, starting
the prefetch engine before initiating the dma transfer may result in
the prefetch triggering a dma request but instead of it being handled
it can end up being cleared. This will result in a hang since the code
will continue to wait for the dma request to complete.

By initiating the dma request before enabling the prefetch engine this
race condition is avoided and no dma request are missed/cleared.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-05-05 23:52:01 +02:00
..
chips mtd: cfi_cmdset_0001: fixing memory leak and handling failed kmalloc 2016-01-06 17:23:10 -08:00
devices mtd: docg3: switch to mtd_ooblayout_ops 2016-04-19 22:05:56 +02:00
lpddr mtd: lpddr: show parent device in sysfs 2015-10-13 09:21:17 -07:00
maps MTD updates for v4.5: 2016-01-13 11:25:54 -08:00
nand mtd: nand: omap2: Start dma request before enabling prefetch 2016-05-05 23:52:01 +02:00
onenand mtd: onenand: switch to mtd_ooblayout_ops 2016-05-05 23:51:49 +02:00
spi-nor mtd: spi-nor: support lock/unlock for a few Winbond chips 2016-03-07 18:01:58 -08:00
tests MTD updates for v4.6 2016-03-24 19:57:15 -07:00
ubi mtd: ubi: Add logging functions ubi_msg, ubi_warn and ubi_err 2016-03-20 21:36:05 +01:00
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: don't fail because of bit-flips 2016-01-23 14:40:47 -08:00
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 mtd: blkdevs: fix potential deadlock + lockdep warnings 2015-10-30 17:24:43 -07:00
mtdblock_ro.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdblock.c mtd: mtdblock: remove the needless mtdblks_lock 2015-01-07 12:51:56 -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 mtd: kill the nand_ecclayout struct 2016-05-05 23:51:51 +02:00
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 mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition 2016-04-19 22:05:55 +02:00
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 mtd: sm_ftl: fix wrong do_div() usage 2015-11-16 15:07:16 -08:00
sm_ftl.h mtd: sm_ftl: cosmetic, use bool when possible 2010-10-25 01:33:08 +01:00
ssfdc.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00