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| author | Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> | 2023-01-26 07:36:09 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 13:57:35 +0100 |
| commit | 587b48b18a8adb2adc7272f2274ac7573fb1646d (patch) | |
| tree | a73cb2f975dbe651dae4123624bb6fe4494d66e3 | |
| parent | 2b59fdcaaf2461a60e658a859f4a659a573019bf (diff) | |
| download | linux-587b48b18a8adb2adc7272f2274ac7573fb1646d.tar.gz linux-587b48b18a8adb2adc7272f2274ac7573fb1646d.tar.bz2 linux-587b48b18a8adb2adc7272f2274ac7573fb1646d.zip | |
iio: accel: mma9551_core: Prevent uninitialized variable in mma9551_read_config_word()
[ Upstream commit 64a68158738ec8f520347144352f7a09bdb9e169 ]
Smatch Warns:
drivers/iio/accel/mma9551_core.c:299
mma9551_read_config_word() error: uninitialized symbol 'v'.
When (offset >= 1 << 12) is true mma9551_transfer() will return -EINVAL
without 'v' being initialized, so check for the error and return.
Note: No actual bug as caller checks the return value and does not
use the parameter in the problem case.
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/20230126153610.3586243-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/iio/accel/mma9551_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c index 413610a749c2..9023c07bb57b 100644 --- a/drivers/iio/accel/mma9551_core.c +++ b/drivers/iio/accel/mma9551_core.c @@ -296,9 +296,12 @@ int mma9551_read_config_word(struct i2c_client *client, u8 app_id, ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG, reg, NULL, 0, (u8 *)&v, 2); + if (ret < 0) + return ret; + *val = be16_to_cpu(v); - return ret; + return 0; } EXPORT_SYMBOL(mma9551_read_config_word); |