From c2a3b3cce8df1cafeda2ab03563d7e703c51a4ac Mon Sep 17 00:00:00 2001
From: Dmitry Bazhenov <dmitry.bazhenov@auriga.com>
Date: Thu, 18 Jan 2018 05:39:21 +0000
Subject: [PATCH] i2c: xlp9xx: return ENXIO on slave address NACK
Fix the driver violation of the common practice to return
ENXIO error on a slave address NACK.
Signed-off-by: Dmitry Bazhenov <dmitry.bazhenov@auriga.com>
Signed-off-by: George Cherian <george.cherian@cavium.com>
Tested-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---
drivers/i2c/busses/i2c-xlp9xx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c
index b970bf8f38e57f..6d78cdc5cf91ab 100644
--- a/drivers/i2c/busses/i2c-xlp9xx.c
+++ b/drivers/i2c/busses/i2c-xlp9xx.c
@@ -324,7 +324,8 @@ static int xlp9xx_i2c_xfer_msg(struct xlp9xx_i2c_dev *priv, struct i2c_msg *msg,
dev_dbg(priv->dev, "transfer error %x!\n", priv->msg_err);
if (priv->msg_err & XLP9XX_I2C_INTEN_BUSERR)
xlp9xx_i2c_init(priv);
- return -EIO;
+ return (priv->msg_err & XLP9XX_I2C_INTEN_NACKADDR) ?
+ -ENXIO : -EIO;
}
if (timeleft == 0) {
--
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