From: dillon min <dillon.minfei@xxxxxxxxx> since chip spi driver need get the transfer direction by 'tx_buf' and 'rx_buf' of 'struct spi_transfer' in 'SPI_3WIRE' mode. so, we need bypass 'SPI_CONTROLLER_MUST_RX' and 'SPI_CONTROLLER_MUST_TX' feature in 'SPI_3WIRE' mode Signed-off-by: dillon min <dillon.minfei@xxxxxxxxx> --- drivers/spi/spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index c92c89467e7e..f8844116f955 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1023,7 +1023,8 @@ static int spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) void *tmp; unsigned int max_tx, max_rx; - if (ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) { + if ((ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) + && !(msg->spi->mode & SPI_3WIRE)) { max_tx = 0; max_rx = 0; -- 2.7.4 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel