From: Trent Piepho <tpiepho@gmail.com>
Date: Tue, 1 Oct 2013 20:15:11 +0000 (-0700)
Subject: spi: spi-mxs: Remove full duplex check, spi core already does it
X-Git-Tag: v5.15~19014^2~13^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=210f65fedf1d26d0a1d604fa82425018f7ad6090;p=platform%2Fkernel%2Flinux-starfive.git

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 a9a273e..de7387e 100644
--- 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.