[U-Boot] [PATCH] spi: spi-mem: Fix read data size issue

[Jagan Teki]

On Wed, Jul 10, 2019 at 2:54 PM Ye Li <ye.li at nxp.com> wrote:
>
> 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 at 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);
> +               }

Reviewed-by: Jagan Teki <jagan at amarulasolutions.com>