diff options
| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2014-02-11 14:03:29 +0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-05-15 11:54:53 +0400 |
| commit | 1a842865236d89ce387f185a31f474cf508d4f70 (patch) | |
| tree | 4fd0c965102482cac39a7d2fbeb333171c242361 /drivers | |
| parent | e1cfcc1b5dbafcde81abfe096c0f11226e8597d8 (diff) | |
| download | linux-1a842865236d89ce387f185a31f474cf508d4f70.tar.xz | |
mfd: 88pm860x: Fix possible NULL pointer dereference on i2c_new_dummy error
commit 159ce52a6b777fc82fa0b51c7440e25f9e4c6feb upstream.
During probe the driver allocates dummy I2C device for companion chip
with i2c_new_dummy() but it does not check the return value of this call.
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 regmap_init_i2c().
If i2c_new_dummy() fails for companion device, fail also the probe for
main MFD driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/88pm860x-core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mfd/88pm860x-core.c b/drivers/mfd/88pm860x-core.c index 7ebe9ef1eba6..675f96b37643 100644 --- a/drivers/mfd/88pm860x-core.c +++ b/drivers/mfd/88pm860x-core.c @@ -1179,6 +1179,11 @@ static int pm860x_probe(struct i2c_client *client, chip->companion_addr = pdata->companion_addr; chip->companion = i2c_new_dummy(chip->client->adapter, chip->companion_addr); + if (!chip->companion) { + dev_err(&client->dev, + "Failed to allocate I2C companion device\n"); + return -ENODEV; + } chip->regmap_companion = regmap_init_i2c(chip->companion, &pm860x_regmap_config); if (IS_ERR(chip->regmap_companion)) { |