From: Tokunori Ikegami <ikegami.t@gmail.com>
To: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Tokunori Ikegami <ikegami.t@gmail.com>,
Chris Packham <chris.packham@alliedtelesis.co.nz>,
linux-mtd@lists.infradead.org, Fabio Bettoni <fbettoni@gmail.com>,
Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
Subject: [PATCH v8 8/9] mtd: cfi_cmdset_0002: Split do_write_oneword() to reduce exit paths
Date: Tue, 6 Aug 2019 04:03:25 +0900 [thread overview]
Message-ID: <20190805190326.28772-9-ikegami.t@gmail.com> (raw)
In-Reply-To: <20190805190326.28772-1-ikegami.t@gmail.com>
The do_write_oneword_done() is called twice at the exit paths.
By splitting the retry functionality it can be reduced to call once.
Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
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
---
Changes since v7:
- None.
Changes since v6:
- Removed the tag of Koen Vandeputte as same with the v7 1/9 patch.
- Address the ./scripts/checkpatch.pl issue.
Changes since v5:
- Rebased on top of Liu Jian's fixes in master.
- Change the email address of Tokunori Ikegami to ikegami.t@gmail.com.
Changes since v4:
- None.
Changes since v3:
- Just change the email address of Tokunori Ikegami to ikegami_to@yahoo.co.jp.
Changes since v2:
- Add the patch.
drivers/mtd/chips/cfi_cmdset_0002.c | 38 +++++++++++++++++++++++--------------
1 file changed, 24 insertions(+), 14 deletions(-)
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 2ab0dd0b11be..6f6fadb54e5e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1738,25 +1738,16 @@ 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
@@ -1766,7 +1757,6 @@ 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;
}
@@ -1789,6 +1779,26 @@ 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;
--
2.11.0
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next prev parent reply other threads:[~2019-08-05 19:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-05 19:03 [PATCH v8 0/9] mtd: cfi_cmdset_0002: Fix flash write issue for OpenWrt Project Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 1/9] mtd: cfi_cmdset_0002: Use chip_good() to retry in do_write_oneword() Tokunori Ikegami
2019-08-06 0:43 ` Sasha Levin
2019-08-06 14:30 ` Tokunori Ikegami
2019-09-17 18:04 ` Tokunori Ikegami
2019-09-18 5:29 ` Vignesh Raghavendra
2019-09-18 13:40 ` Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 2/9] mtd: cfi_cmdset_0002: Remove goto statement from do_write_buffer() Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 3/9] mtd: cfi_cmdset_0002: Split do_write_oneword() to reduce function size Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 4/9] mtd: cfi_cmdset_0002: Split do_write_oneword() op_done goto statement Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 5/9] mtd: cfi_cmdset_0002: Remove op_done goto statement from do_write_oneword() Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 6/9] mtd: cfi_cmdset_0002: Split write-to-buffer-reset sequence Tokunori Ikegami
2019-08-05 19:03 ` [PATCH v8 7/9] mtd: cfi_cmdset_0002: Split to wait write buffer to check if completed Tokunori Ikegami
2019-08-05 19:03 ` Tokunori Ikegami [this message]
2019-08-05 19:03 ` [PATCH v8 9/9] mtd: cfi_cmdset_0002: Disable write buffer functions if FORCE_WORD_WRITE is 1 Tokunori Ikegami
2019-09-17 4:20 ` [PATCH v8 0/9] mtd: cfi_cmdset_0002: Fix flash write issue for OpenWrt Project Vignesh Raghavendra
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