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authorTokunori Ikegami <ikegami.t@gmail.com>2019-08-06 04:03:25 +0900
committerVignesh Raghavendra <vigneshr@ti.com>2019-08-27 17:55:53 +0530
commit0bcf880b062ef88d144ffe90918c56dd11e3d935 (patch)
treec37f5607bb17bf06869a6f5e6386e001e4ccfb1c /drivers/mtd/chips/cfi_cmdset_0002.c
parent6beb3ea746db88904a5ab8f2cc87837489e46612 (diff)
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/cfi_cmdset_0002.c')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c38
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;