regulator: vctrl: Fix out of bounds array access for vctrl->vtable

Current code only allocates rdesc->n_voltages entries for vctrl->vtable.
Thus use rdesc->n_voltages instead of n_voltages in the for loop.

While at it, also switch to use devm_kcalloc instead of devm_kmalloc_array
+ __GFP_ZERO flag and fix the argument order.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/vctrl-regulator.c

@@ -345,9 +345,9 @@ static int vctrl_init_vtable(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	vctrl->vtable = devm_kmalloc_array(
-		&pdev->dev, sizeof(struct vctrl_voltage_table),
-		rdesc->n_voltages, GFP_KERNEL | __GFP_ZERO);
+	vctrl->vtable = devm_kcalloc(&pdev->dev, rdesc->n_voltages,
+				     sizeof(struct vctrl_voltage_table),
+				     GFP_KERNEL);
 	if (!vctrl->vtable)
 		return -ENOMEM;
 
@@ -371,7 +371,7 @@ static int vctrl_init_vtable(struct platform_device *pdev)
 	     NULL);
 
 	/* pre-calculate OVP-safe downward transitions */
-	for (i = n_voltages - 1; i > 0; i--) {
+	for (i = rdesc->n_voltages - 1; i > 0; i--) {
 		int j;
 		int ovp_min_uV = (vctrl->vtable[i].out *
 				  (100 - vctrl->ovp_threshold)) / 100;