When slave drivers don't set the max_read_size, the spi-mem should directly use data.nbytes and not limit to any size. But current logic will limit to the max_write_size.
Signed-off-by: Ye Li ye.li@nxp.com --- drivers/spi/spi-mem.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index b86eee7..be440fe 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -423,12 +423,14 @@ int spi_mem_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op) if (slave->max_write_size && len > slave->max_write_size) return -EINVAL;
- if (op->data.dir == SPI_MEM_DATA_IN && slave->max_read_size) - op->data.nbytes = min(op->data.nbytes, + if (op->data.dir == SPI_MEM_DATA_IN) { + if (slave->max_read_size) + op->data.nbytes = min(op->data.nbytes, slave->max_read_size); - else if (slave->max_write_size) + } else if (slave->max_write_size) { op->data.nbytes = min(op->data.nbytes, slave->max_write_size - len); + }
if (!op->data.nbytes) return -EINVAL;