diff options
| author |   Tokunori Ikegami <ikegami.t@gmail.com> | 2019-08-06 04:03:25 +0900 |
|---|---|---|
| committer |   Vignesh Raghavendra <vigneshr@ti.com> | 2019-08-27 17:55:53 +0530 |
| commit | 0bcf880b062ef88d144ffe90918c56dd11e3d935 (patch) | |
| tree | c37f5607bb17bf06869a6f5e6386e001e4ccfb1c /drivers/mtd/chips | |
| parent | mtd: cfi_cmdset_0002: Split wait for write buffer completion sequence (diff) | |
| download | linux-dev-0bcf880b062ef88d144ffe90918c56dd11e3d935.tar.xz linux-dev-0bcf880b062ef88d144ffe90918c56dd11e3d935.zip | |
mtd: cfi_cmdset_0002: Split do_write_oneword() to reduce exit paths
The do_write_oneword_done() is called twice at the exit paths.
By splitting the retry functionality it can be reduced to call once.
Cc: Fabio Bettoni <fbettoni@gmail.com>
Co: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index 6f9f77dbc6d7..48405f0f9c24 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1739,25 +1739,16 @@ static void __xipram do_write_oneword_done(struct map_info *map, mutex_unlock(&chip->mutex); } -static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, - unsigned long adr, map_word datum, - int mode) +static int __xipram do_write_oneword_retry(struct map_info *map, + struct flchip *chip, + unsigned long adr, map_word datum, + int mode) { struct cfi_private *cfi = map->fldrv_priv; int ret = 0; map_word oldd; int retry_cnt = 0; - adr += chip->start; - - pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", __func__, adr, - datum.x[0]); - - ret = do_write_oneword_start(map, chip, adr, mode); - if (ret) { - return ret; - } - /* * Check for a NOP for the case when the datum to write is already * present - it saves time and works around buggy chips that corrupt @@ -1767,7 +1758,6 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, oldd = map_read(map, adr); if (map_word_equal(map, oldd, datum)) { pr_debug("MTD %s(): NOP\n", __func__); - do_write_oneword_done(map, chip, adr, mode); return ret; } @@ -1790,6 +1780,26 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, } xip_enable(map, chip, adr); + return ret; +} + +static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, + unsigned long adr, map_word datum, + int mode) +{ + int ret = 0; + + adr += chip->start; + + pr_debug("MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", __func__, adr, + datum.x[0]); + + ret = do_write_oneword_start(map, chip, adr, mode); + if (ret) + return ret; + + ret = do_write_oneword_retry(map, chip, adr, datum, mode); + do_write_oneword_done(map, chip, adr, mode); return ret; |