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From: Axel Lin <axel.lin-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH] spi: core: Fix transfer failure when master->transfer_one returns positive value
Date: Sat, 18 Jan 2014 22:05:22 +0800	[thread overview]
Message-ID: <1390053922.16621.4.camel@phoenix> (raw)

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-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org>
---
 drivers/spi/spi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index db421bd..11fefd5 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -609,8 +609,10 @@ static int spi_transfer_one_message(struct spi_master *master,
 			goto out;
 		}
 
-		if (ret > 0)
+		if (ret > 0) {
+			ret = 0;
 			wait_for_completion(&master->xfer_completion);
+		}
 
 		trace_spi_transfer_stop(msg, xfer);
 
-- 
1.8.1.2



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             reply	other threads:[~2014-01-18 14:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-18 14:05 Axel Lin [this message]
2014-01-21 18:45 ` [PATCH] spi: core: Fix transfer failure when master->transfer_one returns positive value Mark Brown

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