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From 99768b3062501b05810fb62545279da3a4371ca0 Mon Sep 17 00:00:00 2001
From: Michal Suchanek <hramrach@gmail.com>
Date: Wed, 2 Dec 2015 10:38:19 +0000
Subject: [PATCH 092/113] mtd: fsl-quadspi: return amount of data read/written
or error
Return amount of data read/written or error as read(2)/write(2) does.
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
---
drivers/mtd/spi-nor/fsl-quadspi.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -618,7 +618,7 @@ static inline void fsl_qspi_invalid(stru
qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
}
-static int fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor,
+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)
{
@@ -647,8 +647,11 @@ static int fsl_qspi_nor_write(struct fsl
/* Trigger it */
ret = fsl_qspi_runcmd(q, opcode, to, count);
- if (ret == 0 && retlen)
- *retlen += count;
+ if (ret == 0) {
+ if (retlen)
+ *retlen += count;
+ return count;
+ }
return ret;
}
@@ -860,6 +863,8 @@ static int fsl_qspi_write_reg(struct spi
} else if (len > 0) {
ret = fsl_qspi_nor_write(q, nor, opcode, 0,
(u32 *)buf, len, NULL);
+ if (ret > 0)
+ return 0;
} else {
dev_err(q->dev, "invalid cmd %d\n", opcode);
ret = -EINVAL;
@@ -873,12 +878,12 @@ static ssize_t fsl_qspi_write(struct spi
{
struct fsl_qspi *q = nor->priv;
- fsl_qspi_nor_write(q, nor, nor->program_opcode, to,
+ ssize_t ret = fsl_qspi_nor_write(q, nor, nor->program_opcode, to,
(u32 *)buf, len, retlen);
/* invalid the data in the AHB buffer. */
fsl_qspi_invalid(q);
- return 0;
+ return ret;
}
static ssize_t fsl_qspi_read(struct spi_nor *nor, loff_t from,
@@ -924,8 +929,7 @@ static ssize_t fsl_qspi_read(struct spi_
memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
len);
- *retlen += len;
- return 0;
+ return len;
}
static int fsl_qspi_erase(struct spi_nor *nor, loff_t offs)
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