From: Harshit Mogalapalli harshit.m.mogalapalli@oracle.com
[ 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@ora... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/accel/mma9551_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c index 413610a749c24..9023c07bb57b4 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);