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regulator: max8997: clean up a condition in max8997_list_voltage() 

The current code generates a static cehcker warnings because "rid < 0"
is always false:

    drivers/regulator/max8997-regulator.c:169 max8997_list_voltage()
    warn: condition is always false

The problem is that because of type promotion, if "rid" is negative the
comparison against ARRAY_SIZE() is type promoted to size_t and it's
treated as a very high positive value.  I've changed the order of the
checks so now everyone is happy.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dan Carpenter 2018-07-06 11:37:18 +03:00 committed by Mark Brown
parent ed1ae2dd9f
commit 1aa1b91894
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1 changed files with 1 additions and 2 deletions
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drivers/regulator/max8997-regulator.c
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@ -165,8 +165,7 @@ static int max8997_list_voltage(struct regulator_dev *rdev,
int rid = rdev_get_id(rdev);
int val;
if (rid >= ARRAY_SIZE(reg_voltage_map) ||
rid < 0)
if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map))
return -EINVAL;
desc = reg_voltage_map[rid];