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spi: spi-mem-nodm: Fix read data size issue

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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.

This commit mirrors the same changes in the dm version done in
commit 535b1fdb8e ("spi: spi-mem: Fix read data size issue").

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Bin Meng 2021-07-28 20:50:14 +08:00 committed by Jagan Teki
parent 9102cce7f4
commit cb42425aa1
1 changed files with 6 additions and 4 deletions
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10
drivers/spi/spi-mem-nodm.c
View file

@ -93,12 +93,14 @@ int spi_mem_adjust_op_size(struct spi_slave *slave,
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,
slave->max_read_size);
else if (slave->max_write_size)
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) {
op->data.nbytes = min(op->data.nbytes,
slave->max_write_size - len);
}
if (!op->data.nbytes)
return -EINVAL;