diff options
| author | Joe Perches <joe@perches.com> | 2015-05-18 10:01:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-21 10:10:04 -0700 |
| commit | 1a9850fbeb65734827a7dd0088ea357b0f22a242 (patch) | |
| tree | a846d8fbe82ae49fb808df7d3c1c9a3ce0996379 /drivers/regulator | |
| parent | 6489f7a496378983980e8219dfaeaf66d581590b (diff) | |
regulator: max77686: fix gpio_enabled shift wrapping bug
commit c53403a37cf083ce85da720f18918f73580d0064 upstream.
The code should handle more than 32 bits here because "id"
can be a value up to MAX77686_REGULATORS (currently 34).
Convert the gpio_enabled type to DECLARE_BITMAP and use
test_bit/set_bit.
Fixes: 3307e9025d29 ("regulator: max77686: Add GPIO control")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/max77686.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c index 15fb1416bfbd..c064e32fb3b9 100644 --- a/drivers/regulator/max77686.c +++ b/drivers/regulator/max77686.c @@ -88,7 +88,7 @@ enum max77686_ramp_rate { }; struct max77686_data { - u64 gpio_enabled:MAX77686_REGULATORS; + DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS); /* Array indexed by regulator id */ unsigned int opmode[MAX77686_REGULATORS]; @@ -121,7 +121,7 @@ static unsigned int max77686_map_normal_mode(struct max77686_data *max77686, case MAX77686_BUCK8: case MAX77686_BUCK9: case MAX77686_LDO20 ... MAX77686_LDO22: - if (max77686->gpio_enabled & (1 << id)) + if (test_bit(id, max77686->gpio_enabled)) return MAX77686_GPIO_CONTROL; } @@ -277,7 +277,7 @@ static int max77686_of_parse_cb(struct device_node *np, } if (gpio_is_valid(config->ena_gpio)) { - max77686->gpio_enabled |= (1 << desc->id); + set_bit(desc->id, max77686->gpio_enabled); return regmap_update_bits(config->regmap, desc->enable_reg, desc->enable_mask, |