pinctrl: renesas: Switch to use kmemdup_array()

Let kmemdup_array() take care of multiplication and possible overflow.

Signed-off-by: Shen Lichuan <shenlichuan@vivo.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20240822061438.14617-1-shenlichuan@vivo.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: Shen Lichuan

drivers/pinctrl/renesas/pinctrl-rzg2l.c

@@ -528,8 +528,7 @@ static int rzg2l_map_add_config(struct pinctrl_map *map,
 {
 	unsigned long *cfgs;
 
-	cfgs = kmemdup(configs, num_configs * sizeof(*cfgs),
-		       GFP_KERNEL);
+	cfgs = kmemdup_array(configs, num_configs, sizeof(*cfgs), GFP_KERNEL);
 	if (!cfgs)
 		return -ENOMEM;
 

drivers/pinctrl/renesas/pinctrl-rzv2m.c

@@ -196,8 +196,7 @@ static int rzv2m_map_add_config(struct pinctrl_map *map,
 {
 	unsigned long *cfgs;
 
-	cfgs = kmemdup(configs, num_configs * sizeof(*cfgs),
-		       GFP_KERNEL);
+	cfgs = kmemdup_array(configs, num_configs, sizeof(*cfgs), GFP_KERNEL);
 	if (!cfgs)
 		return -ENOMEM;
 

drivers/pinctrl/renesas/pinctrl.c

@@ -83,8 +83,7 @@ static int sh_pfc_map_add_config(struct pinctrl_map *map,
 {
 	unsigned long *cfgs;
 
-	cfgs = kmemdup(configs, num_configs * sizeof(*cfgs),
-		       GFP_KERNEL);
+	cfgs = kmemdup_array(configs, num_configs, sizeof(*cfgs), GFP_KERNEL);
 	if (cfgs == NULL)
 		return -ENOMEM;