From: Wolfram Sang <wsa@kernel.org>
Date: Mon, 20 Feb 2023 14:40:59 +0000 (+0100)
Subject: i2c: gxp: return proper error on address NACK
X-Git-Tag: v6.6.7~3336^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4b3dfb0ed6336dea4a763ce9fa30a42763eb3800;p=platform%2Fkernel%2Flinux-starfive.git

i2c: gxp: return proper error on address NACK

According to Documentation/i2c/fault-codes.rst, NACK after sending an
address should be -ENXIO.

Signed-off-by: Wolfram Sang <wsa@kernel.org>
---

diff --git a/drivers/i2c/busses/i2c-gxp.c b/drivers/i2c/busses/i2c-gxp.c
index 352dedf..fda7809 100644
--- a/drivers/i2c/busses/i2c-gxp.c
+++ b/drivers/i2c/busses/i2c-gxp.c
@@ -129,8 +129,10 @@ static int gxp_i2c_master_xfer(struct i2c_adapter *adapter,
 	if (time_left == 0)
 		return -ETIMEDOUT;
 
-	if (drvdata->state == GXP_I2C_ADDR_NACK ||
-	    drvdata->state == GXP_I2C_DATA_NACK)
+	if (drvdata->state == GXP_I2C_ADDR_NACK)
+		return -ENXIO;
+
+	if (drvdata->state == GXP_I2C_DATA_NACK)
 		return -EIO;
 
 	return ret;