linux-kernel - [PATCH] drivers: i2c: i2c-st: Fix return in case of arbitration lost

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Date:	Fri, 28 Feb 2014 13:52:56 +0100
From:	Maxime COQUELIN <maxime.coquelin@...com>
To:	Wolfram Sang <wsa@...-dreams.de>,
	Maxime Coquelin <maxime.coquelin@...com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	srinivas.kandagatla@...com, kernel@...inux.com
Subject: [PATCH] drivers: i2c: i2c-st: Fix return in case of arbitration lost

This patch fixes the error returned to the i2c_transfer function
to -EAGAIN in case of arbitratin lost, so that the retry mechanism
can be used.

Signed-off-by: Maxime Coquelin <maxime.coquelin@...com>
---
 drivers/i2c/busses/i2c-st.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
index 9cf715d..8720161 100644
--- a/drivers/i2c/busses/i2c-st.c
+++ b/drivers/i2c/busses/i2c-st.c
@@ -574,7 +574,7 @@ static irqreturn_t st_i2c_isr_thread(int irq, void *data)
 		writel_relaxed(it, i2c_dev->base + SSC_IEN);
 
 		st_i2c_set_bits(i2c_dev->base + SSC_I2C, SSC_I2C_STOPG);
-		c->result = -EIO;
+		c->result = -EAGAIN;
 		break;
 
 	default:
-- 
1.9.0

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