@@ -81,6 +81,7 @@ static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,
struct spi_transfer t[2] = {};
struct spi_message m;
int cmd_sz = m25p_cmdsz(nor);
+ ssize_t ret;
spi_message_init(&m);
@@ -98,10 +99,15 @@ static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,
t[1].len = len;
spi_message_add_tail(&t[1], &m);
- spi_sync(spi, &m);
+ ret = spi_sync(spi, &m);
+ if (ret)
+ return ret;
- *retlen += m.actual_length - cmd_sz;
- return 0;
+ ret = m.actual_length - cmd_sz;
+ if (ret < 0)
+ return -EIO;
+ *retlen += ret;
+ return ret;
}
static inline unsigned int m25p80_rx_nbits(struct spi_nor *nor)
@@ -128,6 +134,7 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
struct spi_transfer t[2];
struct spi_message m;
unsigned int dummy = nor->read_dummy;
+ ssize_t ret;
/* convert the dummy cycles to the number of bytes */
dummy /= 8;
@@ -147,10 +154,15 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
t[1].len = len;
spi_message_add_tail(&t[1], &m);
- spi_sync(spi, &m);
+ ret = spi_sync(spi, &m);
+ if (ret)
+ return ret;
- *retlen = m.actual_length - m25p_cmdsz(nor) - dummy;
- return 0;
+ ret = m.actual_length - m25p_cmdsz(nor) - dummy;
+ if (ret < 0)
+ return -EIO;
+ *retlen += ret;
+ return ret;
}
/*
Add checking of SPI transfer errors and return them from read/write functions. Also return the amount of data transferred. Signed-off-by: Michal Suchanek <hramrach@gmail.com> --- drivers/mtd/devices/m25p80.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-)