regulator: lp8788-buck: Silence build warning
This driver use id as array index, thus add bounder checking for id.
This patch fixes below build warning:
drivers/regulator/lp8788-buck.c: In function 'lp8788_buck_probe':
drivers/regulator/lp8788-buck.c:490:8: warning: array subscript is above array bounds [-Warray-bounds]
drivers/regulator/lp8788-buck.c:489:63: warning: array subscript is above array bounds [-Warray-bounds]
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/lp8788-buck.c b/drivers/regulator/lp8788-buck.c
index 1161949..ef845c7 100644
--- a/drivers/regulator/lp8788-buck.c
+++ b/drivers/regulator/lp8788-buck.c
@@ -474,7 +474,7 @@
u8 default_dvs_mode[] = { LP8788_BUCK1_DVS_I2C, LP8788_BUCK2_DVS_I2C };
/* no dvs for buck3, 4 */
- if (id == BUCK3 || id == BUCK4)
+ if (id > BUCK2)
return 0;
/* no dvs platform data, then dvs will be selected by I2C registers */
@@ -505,6 +505,9 @@
struct regulator_dev *rdev;
int ret;
+ if (id >= LP8788_NUM_BUCKS)
+ return -EINVAL;
+
buck = devm_kzalloc(&pdev->dev, sizeof(struct lp8788_buck), GFP_KERNEL);
if (!buck)
return -ENOMEM;