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

[Ye Li]

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);
+		}
 
 		if (!op->data.nbytes)
 			return -EINVAL;
-- 
2.7.4