clk: samsung: Initialize clock table with error pointers

Before this patch, the driver was simply zeroing the clock table, which
is incorrect, because invalid clock numbers returned NULL instead of
error pointers. This patch fixes this by changing the driver to
initialize the array with PTR_ERR(-ENOENT).
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>

drivers/clk/samsung/clk.c

@@ -54,14 +54,19 @@ struct samsung_clk_provider *__init samsung_clk_init(struct device_node *np,
 	struct samsung_clk_provider *ctx;
 	struct clk **clk_table;
 	int ret;
+	int i;
+
 	ctx = kzalloc(sizeof(struct samsung_clk_provider), GFP_KERNEL);
 	if (!ctx)
 		panic("could not allocate clock provider context.\n");
 
-	clk_table = kzalloc(sizeof(struct clk *) * nr_clks, GFP_KERNEL);
+	clk_table = kcalloc(nr_clks, sizeof(struct clk *), GFP_KERNEL);
 	if (!clk_table)
 		panic("could not allocate clock lookup table\n");
 
+	for (i = 0; i < nr_clks; ++i)
+		clk_table[i] = ERR_PTR(-ENOENT);
+
 	ctx->reg_base = base;
 	ctx->clk_data.clks = clk_table;
 	ctx->clk_data.clk_num = nr_clks;