spi: spi-mxs: Remove full duplex check, spi core already does it

Because the driver sets the SPI_MASTER_HALF_DUPLEX flag, the spi core
will check transfers to insure they are not full duplex.  It's not
necessary to check that in the spi-mxs driver as well.

Signed-off-by: Trent Piepho <tpiepho@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index a9a273e20fd2516f873ae1416c86b91d344aa9c4..de7387ef25b8b01b02bae124416e4b39f9e51b56 100644 (file)
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -399,12 +399,6 @@ static int mxs_spi_transfer_one(struct spi_master *master,
                /* De-assert on last transfer, inverted by cs_change flag */
                flag = (&t->transfer_list == m->transfers.prev) ^ t->cs_change ?
                       TXRX_DEASSERT_CS : 0;
-               if ((t->rx_buf && t->tx_buf) || (t->rx_dma && t->tx_dma)) {
-                       dev_err(ssp->dev,
-                               "Cannot send and receive simultaneously\n");
-                       status = -EINVAL;
-                       break;
-               }
 
                /*
                 * Small blocks can be transfered via PIO.