linux-kernel - [PATCH] Revert "Staging: iio: adt7316: Add an extra check for 'ret' equals to 0"

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Date:   Tue,  4 Dec 2018 18:49:00 -0700
From:   Jeremy Fertic <jeremyfertic@...il.com>
To:     jic23@...nel.org, linux-iio@...r.kernel.org
Cc:     lars@...afoo.de, Michael.Hennerich@...log.com, knaack.h@....de,
        pmeerw@...erw.net, gregkh@...uxfoundation.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Jeremy Fertic <jeremyfertic@...il.com>
Subject: [PATCH] Revert "Staging: iio: adt7316: Add an extra check for 'ret' equals to 0"

This reverts commit 00426e99789357dbff7e719a092ce36a3ce49d94.

i2c_smbus_read_byte() returns 0 when a byte with the value 0 is read from
the device. This is a valid read so revert the check for 0.

Signed-off-by: Jeremy Fertic <jeremyfertic@...il.com>
---
 drivers/staging/iio/addac/adt7316-i2c.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
index ac91163656b5..2d51bd425662 100644
--- a/drivers/staging/iio/addac/adt7316-i2c.c
+++ b/drivers/staging/iio/addac/adt7316-i2c.c
@@ -30,10 +30,6 @@ static int adt7316_i2c_read(void *client, u8 reg, u8 *data)
 	}
 
 	ret = i2c_smbus_read_byte(client);
-
-	if (!ret)
-		return -EIO;
-
 	if (ret < 0) {
 		dev_err(&cl->dev, "I2C read error\n");
 		return ret;
-- 
2.19.1