diff options
| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2014-02-11 13:12:25 +0400 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-03-18 14:50:18 +0400 |
| commit | 65aba1e04916d72b30c028730a1e31860c225412 (patch) | |
| tree | 48fe323dd2451d9b92aab74e524b35178605348e /drivers/mfd/sec-core.c | |
| parent | dc6919663f7a02d02cc08d605a1f68d6cefe0042 (diff) | |
| download | linux-65aba1e04916d72b30c028730a1e31860c225412.tar.xz | |
mfd: sec-core: Fix possible NULL pointer dereference when i2c_new_dummy error
During probe the sec-core driver allocates dummy I2C device for RTC with
i2c_new_dummy() but return value is not checked. In case of error
(i2c_new_device(): memory allocation failure or I2C address cannot be
used) this function returns NULL which is later used by
devm_regmap_init_i2c() or i2c_unregister_device().
If i2c_new_dummy() fails for RTC device, fail also the probe for main
MFD driver.
Cc: stable@vger.kernel.org
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/sec-core.c')
| -rw-r--r-- | drivers/mfd/sec-core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c index a4df76c160f8..d163c66edebb 100644 --- a/drivers/mfd/sec-core.c +++ b/drivers/mfd/sec-core.c @@ -298,6 +298,10 @@ static int sec_pmic_probe(struct i2c_client *i2c, } sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); + if (!sec_pmic->rtc) { + dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n"); + return -ENODEV; + } i2c_set_clientdata(sec_pmic->rtc, sec_pmic); sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc); |