commit 13a4279880229240af38486611c94587492b24d3
author Axel Lin <axel.lin@ingics.com> Sat Jan 18 22:05:22 2014 +0800
committer Mark Brown <broonie@linaro.org> Tue Jan 21 18:45:34 2014 +0000
tree 5f314e84b0e364d24edc616cbd4031a305269ead
parent bd6857a0c630207484a03ddc470fab34b23f80bb

spi: core: Fix transfer failure when master->transfer_one returns positive value

master->transfer_one returns positive value is not a error.
So set ret to 0 when master->transfer_one returns positive value.
Otherwise, I hit "spi_master spi0: failed to transfer one message from queue"
error when my transfer_one callback returns 1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi.c

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 56b4109..8ed1aee 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -599,8 +599,10 @@
 			goto out;
 		}
 
-		if (ret > 0)
+		if (ret > 0) {
+			ret = 0;
 			wait_for_completion(&master->xfer_completion);
+		}
 
 		trace_spi_transfer_stop(msg, xfer);