From 1295e36a488efdad9b21eb0aeabfd0b23a87a313 Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Fri, 4 Mar 2016 09:18:41 -0800 Subject: [PATCH] clk: sunxi: Remove use of variable length array Using an array allocated on the stack may lead to stack overflows and other problems so let's move the allocation to the heap instead. This silences the following checker warning as well. drivers/clk/sunxi/clk-sun8i-mbus.c:36:29: warning: Variable length array is used Cc: Chen-Yu Tsai Acked-by: Maxime Ripard Signed-off-by: Stephen Boyd --- drivers/clk/sunxi/clk-sun8i-mbus.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/clk/sunxi/clk-sun8i-mbus.c b/drivers/clk/sunxi/clk-sun8i-mbus.c index 3aaa9cbef791..411d3033a96e 100644 --- a/drivers/clk/sunxi/clk-sun8i-mbus.c +++ b/drivers/clk/sunxi/clk-sun8i-mbus.c @@ -33,7 +33,7 @@ static DEFINE_SPINLOCK(sun8i_a23_mbus_lock); static void __init sun8i_a23_mbus_setup(struct device_node *node) { int num_parents = of_clk_get_parent_count(node); - const char *parents[num_parents]; + const char **parents; const char *clk_name = node->name; struct resource res; struct clk_divider *div; @@ -43,10 +43,14 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node) void __iomem *reg; int err; + parents = kcalloc(num_parents, sizeof(*parents), GFP_KERNEL); + if (!parents) + return; + reg = of_io_request_and_map(node, 0, of_node_full_name(node)); if (!reg) { pr_err("Could not get registers for sun8i-mbus-clk\n"); - return; + goto err_free_parents; } div = kzalloc(sizeof(*div), GFP_KERNEL); @@ -90,6 +94,7 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node) if (err) goto err_unregister_clk; + kfree(parents); /* parents is deep copied */ /* The MBUS clocks needs to be always enabled */ __clk_get(clk); clk_prepare_enable(clk); @@ -109,5 +114,7 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node) iounmap(reg); of_address_to_resource(node, 0, &res); release_mem_region(res.start, resource_size(&res)); +err_free_parents: + kfree(parents); } CLK_OF_DECLARE(sun8i_a23_mbus, "allwinner,sun8i-a23-mbus-clk", sun8i_a23_mbus_setup);