diff options
| author | Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> | 2023-01-26 07:36:09 -0800 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-01-28 17:40:17 +0000 |
| commit | 64a68158738ec8f520347144352f7a09bdb9e169 (patch) | |
| tree | 07c8e4a07b8bb2ac8edfb8eefed05c12dc81d6fc | |
| parent | e56d2c34ce9dc122b1a618172ec0e05e50adb9e9 (diff) | |
iio: accel: mma9551_core: Prevent uninitialized variable in mma9551_read_config_word()
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>
| -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 86437ddc5ca1..b898f865fb87 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_NS(mma9551_read_config_word, IIO_MMA9551); |