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

[Axel Lin]

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....@ingics.com>
---
 drivers/regulator/vctrl-regulator.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/vctrl-regulator.c 
b/drivers/regulator/vctrl-regulator.c
index 6baadef..78de002 100644
--- a/drivers/regulator/vctrl-regulator.c
+++ b/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;
-- 
2.9.3