From: Maxime COQUELIN <maxime.coquelin@st.com>
Date: Fri, 28 Feb 2014 12:52:56 +0000 (+0100)
Subject: i2c: st: Fix return in case of arbitration lost
X-Git-Tag: v3.15-rc1~41^2~30
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=4fda99627dc037d3b316c3b3250075645cfcbe4d;p=linux.git

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@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---

diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
index 9cf715d69551..872016196ef3 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: