clk: samsung: exynos5433: Fix error paths

Add checking the value returned by samsung_clk_alloc_reg_dump() and
devm_kcalloc(). While fixing this, also release all gathered clocks.

Fixes: 523d3de4 ("clk: samsung: exynos5433: Add support for runtime PM")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
[s.nawrocki: squashed patch from K. Kozlowski adding missing slab.h header]
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

drivers/clk/samsung/clk-exynos5433.c

@@ -13,6 +13,7 @@
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/slab.h>
 
 #include <dt-bindings/clock/exynos5433.h>
 
@@ -5584,6 +5585,8 @@ static int __init exynos5433_cmu_probe(struct platform_device *pdev)
 
 	data->clk_save = samsung_clk_alloc_reg_dump(info->clk_regs,
 						    info->nr_clk_regs);
+	if (!data->clk_save)
+		return -ENOMEM;
 	data->nr_clk_save = info->nr_clk_regs;
 	data->clk_suspend = info->suspend_regs;
 	data->nr_clk_suspend = info->nr_suspend_regs;
@@ -5592,12 +5595,19 @@ static int __init exynos5433_cmu_probe(struct platform_device *pdev)
 	if (data->nr_pclks > 0) {
 		data->pclks = devm_kcalloc(dev, sizeof(struct clk *),
 					   data->nr_pclks, GFP_KERNEL);
-
+		if (!data->pclks) {
+			kfree(data->clk_save);
+			return -ENOMEM;
+		}
 		for (i = 0; i < data->nr_pclks; i++) {
 			struct clk *clk = of_clk_get(dev->of_node, i);
 
-			if (IS_ERR(clk))
+			if (IS_ERR(clk)) {
+				kfree(data->clk_save);
+				while (--i >= 0)
+					clk_put(data->pclks[i]);
 				return PTR_ERR(clk);
+			}
 			data->pclks[i] = clk;
 		}
 	}