From: Mark Brown <broonie@linaro.org>
Date: Fri, 27 Sep 2013 19:10:26 +0000 (+0100)
Subject: spi/s3c64xx: Flush FIFOs prior to cleaning up transfer
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=67651b29ef15e5ef9897ed8cb9072222c4cf3432;p=deliverable%2Flinux.git

spi/s3c64xx: Flush FIFOs prior to cleaning up transfer

Ensure that the FIFOs are fully drained before we deassert /CS or do any
delays that have been requested in order to ensure that the behaviour
visible on the bus matches that which was requested by the caller.

Signed-off-by: Mark Brown <broonie@linaro.org>
---

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 229c6b994be3..2e267ce9dc19 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -960,6 +960,8 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
 			goto out;
 		}
 
+		flush_fifo(sdd);
+
 		if (xfer->delay_usecs)
 			udelay(xfer->delay_usecs);
 
@@ -972,8 +974,6 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
 		}
 
 		msg->actual_length += xfer->len;
-
-		flush_fifo(sdd);
 	}
 
 out: