clk: rockchip: Switch to use kmemdup_array()

Let the kememdup_array() take care about multiplication and possible
overflows.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240606161028.2986587-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

drivers/clk/rockchip/clk-cpu.c

@@ -369,9 +369,8 @@ struct clk *rockchip_clk_register_cpuclk(const char *name,
 
 	if (nrates > 0) {
 		cpuclk->rate_count = nrates;
-		cpuclk->rate_table = kmemdup(rates,
-					     sizeof(*rates) * nrates,
-					     GFP_KERNEL);
+		cpuclk->rate_table = kmemdup_array(rates, nrates, sizeof(*rates),
+						   GFP_KERNEL);
 		if (!cpuclk->rate_table) {
 			ret = -ENOMEM;
 			goto unregister_notifier;

drivers/clk/rockchip/clk-pll.c

@@ -1136,10 +1136,10 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
 			len++;
 
 		pll->rate_count = len;
-		pll->rate_table = kmemdup(rate_table,
-					pll->rate_count *
-					sizeof(struct rockchip_pll_rate_table),
-					GFP_KERNEL);
+		pll->rate_table = kmemdup_array(rate_table,
+						pll->rate_count,
+						sizeof(*pll->rate_table),
+						GFP_KERNEL);
 		WARN(!pll->rate_table,
 			"%s: could not allocate rate table for %s\n",
 			__func__, name);