linux-kernel - [PATCH v2] iio: temperature: mlx90635: Fix ERR_PTR dereference in mlx90635

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Date: Mon, 13 May 2024 13:34:27 -0700
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Crt Mori <cmo@...exis.com>, Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com, harshit.m.mogalapalli@...cle.com
Subject: [PATCH  v2] iio: temperature: mlx90635: Fix ERR_PTR dereference in mlx90635_probe()

When devm_regmap_init_i2c() fails, regmap_ee could be error pointer,
instead of checking for IS_ERR(regmap_ee), regmap is checked which looks
like a copy paste error.

Fixes: a1d1ba5e1c28 ("iio: temperature: mlx90635 MLX90635 IR Temperature sensor")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is found using smatch, only compile tested.
v1->v2: Address Crt's comments.
---
 drivers/iio/temperature/mlx90635.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/temperature/mlx90635.c b/drivers/iio/temperature/mlx90635.c
index 1f5c962c1818..f7f88498ba0e 100644
--- a/drivers/iio/temperature/mlx90635.c
+++ b/drivers/iio/temperature/mlx90635.c
@@ -947,9 +947,9 @@ static int mlx90635_probe(struct i2c_client *client)
 				     "failed to allocate regmap\n");
 
 	regmap_ee = devm_regmap_init_i2c(client, &mlx90635_regmap_ee);
-	if (IS_ERR(regmap))
-		return dev_err_probe(&client->dev, PTR_ERR(regmap),
-				     "failed to allocate regmap\n");
+	if (IS_ERR(regmap_ee))
+		return dev_err_probe(&client->dev, PTR_ERR(regmap_ee),
+				     "failed to allocate EEPROM regmap\n");
 
 	mlx90635 = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);
-- 
2.39.3