From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu, Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] iio: hmc5843: fix potential NULL pointer dereferences
Date: Sat, 16 Mar 2019 17:08:33 -0500 [thread overview]
Message-ID: <20190316220836.25092-1-kjlu@umn.edu> (raw)
In-Reply-To: <20190316151912.4a7ea87d@archlinux>
devm_regmap_init_i2c may fail and return NULL. The fix returns
the error when it fails.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
V2: fix the two together
---
drivers/iio/magnetometer/hmc5843_i2c.c | 7 ++++++-
drivers/iio/magnetometer/hmc5843_spi.c | 7 ++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/magnetometer/hmc5843_i2c.c b/drivers/iio/magnetometer/hmc5843_i2c.c
index 3de7f4426ac4..86abba5827a2 100644
--- a/drivers/iio/magnetometer/hmc5843_i2c.c
+++ b/drivers/iio/magnetometer/hmc5843_i2c.c
@@ -58,8 +58,13 @@ static const struct regmap_config hmc5843_i2c_regmap_config = {
static int hmc5843_i2c_probe(struct i2c_client *cli,
const struct i2c_device_id *id)
{
+ struct regmap *regmap = devm_regmap_init_i2c(cli,
+ &hmc5843_i2c_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
return hmc5843_common_probe(&cli->dev,
- devm_regmap_init_i2c(cli, &hmc5843_i2c_regmap_config),
+ regmap,
id->driver_data, id->name);
}
diff --git a/drivers/iio/magnetometer/hmc5843_spi.c b/drivers/iio/magnetometer/hmc5843_spi.c
index 535f03a70d63..8355713651d4 100644
--- a/drivers/iio/magnetometer/hmc5843_spi.c
+++ b/drivers/iio/magnetometer/hmc5843_spi.c
@@ -58,6 +58,7 @@ static const struct regmap_config hmc5843_spi_regmap_config = {
static int hmc5843_spi_probe(struct spi_device *spi)
{
int ret;
+ struct regmap *regmap;
const struct spi_device_id *id = spi_get_device_id(spi);
spi->mode = SPI_MODE_3;
@@ -67,8 +68,12 @@ static int hmc5843_spi_probe(struct spi_device *spi)
if (ret)
return ret;
+ regmap = devm_regmap_init(spi, &hmc5843_spi_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(devm_regmap);
+
return hmc5843_common_probe(&spi->dev,
- devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config),
+ regmap,
id->driver_data, id->name);
}
--
2.17.1
next prev parent reply other threads:[~2019-03-16 22:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-09 5:15 [PATCH] iio: hmc: fix a potential NULL pointer dereference Kangjie Lu
2019-03-09 13:42 ` Tomasz Duszynski
2019-03-09 18:29 ` Jonathan Cameron
[not found] ` <57617810-6F1A-41BF-889C-7A056423C360@umn.edu>
2019-03-16 15:19 ` Jonathan Cameron
2019-03-16 22:08 ` Kangjie Lu [this message]
2019-03-24 10:48 ` [PATCH v2] iio: hmc5843: fix potential NULL pointer dereferences Jonathan Cameron
2019-03-24 11:50 ` Jonathan Cameron
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