[PATCH v7 07/10] mtd: spi-nor: stop passing around retlen
From: Brian Norris
Date: Thu May 05 2016 - 20:33:42 EST
From: Michal Suchanek <hramrach@xxxxxxxxx>
Do not pass retlen to hardware driver read/write functions. Update it in
spi-nor generic driver instead.
Signed-off-by: Michal Suchanek <hramrach@xxxxxxxxx>
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
---
v6 -> v7:
* fix new drivers
drivers/mtd/devices/m25p80.c | 7 ++-----
drivers/mtd/spi-nor/fsl-quadspi.c | 17 ++++++-----------
drivers/mtd/spi-nor/mtk-quadspi.c | 8 +++-----
drivers/mtd/spi-nor/nxp-spifi.c | 6 ++----
drivers/mtd/spi-nor/spi-nor.c | 21 +++++++++++++--------
include/linux/mtd/spi-nor.h | 4 ++--
6 files changed, 28 insertions(+), 35 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 2ef5a6015276..eab46d211ae6 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -74,7 +74,7 @@ static int m25p80_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
}
static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+ const u_char *buf)
{
struct m25p *flash = nor->priv;
struct spi_device *spi = flash->spi;
@@ -106,7 +106,6 @@ static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,
ret = m.actual_length - cmd_sz;
if (ret < 0)
return -EIO;
- *retlen += ret;
return ret;
}
@@ -127,7 +126,7 @@ static inline unsigned int m25p80_rx_nbits(struct spi_nor *nor)
* may be any size provided it is within the physical boundaries.
*/
static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+ u_char *buf)
{
struct m25p *flash = nor->priv;
struct spi_device *spi = flash->spi;
@@ -156,7 +155,6 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
msg.data_nbits = m25p80_rx_nbits(nor);
ret = spi_flash_read(spi, &msg);
- *retlen = msg.retlen;
if (ret < 0)
return ret;
return msg.retlen;
@@ -184,7 +182,6 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
ret = m.actual_length - m25p_cmdsz(nor) - dummy;
if (ret < 0)
return -EIO;
- *retlen += ret;
return ret;
}
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index ea296769f015..5c82e4ef1904 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -620,7 +620,7 @@ static inline void fsl_qspi_invalid(struct fsl_qspi *q)
static ssize_t fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor,
u8 opcode, unsigned int to, u32 *txbuf,
- unsigned count, size_t *retlen)
+ unsigned count)
{
int ret, i, j;
u32 tmp;
@@ -647,11 +647,8 @@ static ssize_t fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor,
/* Trigger it */
ret = fsl_qspi_runcmd(q, opcode, to, count);
- if (ret == 0) {
- if (retlen)
- *retlen += count;
+ if (ret == 0)
return count;
- }
return ret;
}
@@ -862,7 +859,7 @@ static int fsl_qspi_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
} else if (len > 0) {
ret = fsl_qspi_nor_write(q, nor, opcode, 0,
- (u32 *)buf, len, NULL);
+ (u32 *)buf, len);
if (ret > 0)
return 0;
} else {
@@ -874,12 +871,11 @@ static int fsl_qspi_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
}
static ssize_t fsl_qspi_write(struct spi_nor *nor, loff_t to,
- size_t len, size_t *retlen, const u_char *buf)
+ size_t len, const u_char *buf)
{
struct fsl_qspi *q = nor->priv;
-
ssize_t ret = fsl_qspi_nor_write(q, nor, nor->program_opcode, to,
- (u32 *)buf, len, retlen);
+ (u32 *)buf, len);
/* invalid the data in the AHB buffer. */
fsl_qspi_invalid(q);
@@ -887,7 +883,7 @@ static ssize_t fsl_qspi_write(struct spi_nor *nor, loff_t to,
}
static ssize_t fsl_qspi_read(struct spi_nor *nor, loff_t from,
- size_t len, size_t *retlen, u_char *buf)
+ size_t len, u_char *buf)
{
struct fsl_qspi *q = nor->priv;
u8 cmd = nor->read_opcode;
@@ -929,7 +925,6 @@ static ssize_t fsl_qspi_read(struct spi_nor *nor, loff_t from,
memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
len);
- *retlen += len;
return len;
}
diff --git a/drivers/mtd/spi-nor/mtk-quadspi.c b/drivers/mtd/spi-nor/mtk-quadspi.c
index e85687126c25..21c31b373cd3 100644
--- a/drivers/mtd/spi-nor/mtk-quadspi.c
+++ b/drivers/mtd/spi-nor/mtk-quadspi.c
@@ -244,7 +244,7 @@ static void mt8173_nor_set_addr(struct mt8173_nor *mt8173_nor, u32 addr)
}
static ssize_t mt8173_nor_read(struct spi_nor *nor, loff_t from, size_t length,
- size_t *retlen, u_char *buffer)
+ u_char *buffer)
{
int i, ret;
int addr = (int)from;
@@ -255,7 +255,7 @@ static ssize_t mt8173_nor_read(struct spi_nor *nor, loff_t from, size_t length,
mt8173_nor_set_read_mode(mt8173_nor);
mt8173_nor_set_addr(mt8173_nor, addr);
- for (i = 0; i < length; i++, (*retlen)++) {
+ for (i = 0; i < length; i++) {
ret = mt8173_nor_execute_cmd(mt8173_nor, MTK_NOR_PIO_READ_CMD);
if (ret < 0)
return ret;
@@ -298,7 +298,7 @@ static int mt8173_nor_write_buffer(struct mt8173_nor *mt8173_nor, int addr,
}
static ssize_t mt8173_nor_write(struct spi_nor *nor, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+ const u_char *buf)
{
int ret;
struct mt8173_nor *mt8173_nor = nor->priv;
@@ -318,7 +318,6 @@ static ssize_t mt8173_nor_write(struct spi_nor *nor, loff_t to, size_t len,
}
to += SFLASH_WRBUF_SIZE;
buf += SFLASH_WRBUF_SIZE;
- (*retlen) += SFLASH_WRBUF_SIZE;
}
ret = mt8173_nor_write_buffer_disable(mt8173_nor);
if (ret < 0) {
@@ -333,7 +332,6 @@ static ssize_t mt8173_nor_write(struct spi_nor *nor, loff_t to, size_t len,
dev_err(mt8173_nor->dev, "write single byte failed!\n");
return ret;
}
- (*retlen) += len;
}
return len;
diff --git a/drivers/mtd/spi-nor/nxp-spifi.c b/drivers/mtd/spi-nor/nxp-spifi.c
index b0fb86996b8f..73a14f40928b 100644
--- a/drivers/mtd/spi-nor/nxp-spifi.c
+++ b/drivers/mtd/spi-nor/nxp-spifi.c
@@ -173,7 +173,7 @@ static int nxp_spifi_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
}
static ssize_t nxp_spifi_read(struct spi_nor *nor, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+ u_char *buf)
{
struct nxp_spifi *spifi = nor->priv;
int ret;
@@ -183,13 +183,12 @@ static ssize_t nxp_spifi_read(struct spi_nor *nor, loff_t from, size_t len,
return ret;
memcpy_fromio(buf, spifi->flash_base + from, len);
- *retlen += len;
return len;
}
static ssize_t nxp_spifi_write(struct spi_nor *nor, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
+ const u_char *buf)
{
struct nxp_spifi *spifi = nor->priv;
u32 cmd;
@@ -201,7 +200,6 @@ static ssize_t nxp_spifi_write(struct spi_nor *nor, loff_t to, size_t len,
return ret;
writel(to, spifi->io_base + SPIFI_ADDR);
- *retlen += len;
cmd = SPIFI_CMD_DOUT |
SPIFI_CMD_DATALEN(len) |
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index dd5c9eb9b9e0..937e8d6a28bb 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1030,12 +1030,13 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
if (ret)
return ret;
- ret = nor->read(nor, from, len, retlen, buf);
+ ret = nor->read(nor, from, len, buf);
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ);
if (ret < 0)
return ret;
+ *retlen += ret;
return 0;
}
@@ -1062,7 +1063,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
nor->program_opcode = SPINOR_OP_BP;
/* write one byte. */
- ret = nor->write(nor, to, 1, retlen, buf);
+ ret = nor->write(nor, to, 1, buf);
if (ret < 0)
goto sst_write_err;
WARN(ret != 1, "While writing 1 byte written %i bytes\n",
@@ -1078,7 +1079,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
nor->program_opcode = SPINOR_OP_AAI_WP;
/* write two bytes. */
- ret = nor->write(nor, to, 2, retlen, buf + actual);
+ ret = nor->write(nor, to, 2, buf + actual);
if (ret < 0)
goto sst_write_err;
WARN(ret != 2, "While writing 2 bytes written %i bytes\n",
@@ -1101,7 +1102,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
write_enable(nor);
nor->program_opcode = SPINOR_OP_BP;
- ret = nor->write(nor, to, 1, retlen, buf + actual);
+ ret = nor->write(nor, to, 1, buf + actual);
if (ret < 0)
goto sst_write_err;
WARN(ret != 1, "While writing 1 byte written %i bytes\n",
@@ -1110,8 +1111,10 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
if (ret)
goto sst_write_err;
write_disable(nor);
+ actual += 1;
}
sst_write_err:
+ *retlen += actual;
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
return ret;
}
@@ -1140,15 +1143,17 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
/* do all the bytes fit onto one page? */
if (page_offset + len <= nor->page_size) {
- ret = nor->write(nor, to, len, retlen, buf);
+ ret = nor->write(nor, to, len, buf);
if (ret < 0)
goto write_err;
+ *retlen += ret;
} else {
/* the size of data remaining on the first page */
page_size = nor->page_size - page_offset;
- ret = nor->write(nor, to, page_size, retlen, buf);
+ ret = nor->write(nor, to, page_size, buf);
if (ret < 0)
goto write_err;
+ *retlen += ret;
/* write everything in nor->page_size chunks */
for (i = ret; i < len; ) {
@@ -1162,10 +1167,10 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
write_enable(nor);
- ret = nor->write(nor, to + i, page_size, retlen,
- buf + i);
+ ret = nor->write(nor, to + i, page_size, buf + i);
if (ret < 0)
goto write_err;
+ *retlen += ret;
i += ret;
}
}
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index a21c9e4f1fdf..43c290566d20 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -173,9 +173,9 @@ struct spi_nor {
int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
ssize_t (*read)(struct spi_nor *nor, loff_t from,
- size_t len, size_t *retlen, u_char *read_buf);
+ size_t len, u_char *read_buf);
ssize_t (*write)(struct spi_nor *nor, loff_t to,
- size_t len, size_t *retlen, const u_char *write_buf);
+ size_t len, const u_char *write_buf);
int (*erase)(struct spi_nor *nor, loff_t offs);
int (*flash_lock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
--
2.8.0.rc3.226.g39d4020