From dd106d198deee0cf682b97a65d6b171fb80cc4a3 Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Sat, 16 Mar 2019 17:08:33 -0500 Subject: [PATCH] iio: hmc5843: fix potential NULL pointer dereferences [ Upstream commit 536cc27deade8f1ec3c1beefa60d5fbe0f6fcb28 ] devm_regmap_init_i2c may fail and return NULL. The fix returns the error when it fails. Signed-off-by: Kangjie Lu Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- 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 3de7f44..86abba5 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 535f03a..79b2b70 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(spi, &hmc5843_spi_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + return hmc5843_common_probe(&spi->dev, - devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config), + regmap, id->driver_data, id->name); } -- 2.7.4