target/linux/sunxi/patches-3.13/104-clk-sunxi-fix-memory-leak.patch

   1 From 9dc8189536f4c59bb7ad8c736021cefc1488bf74 Mon Sep 17 00:00:00 2001
   2 From: "Victor N. Ramos Mello" <victornrm@gmail.com>
   3 Date: Fri, 18 Oct 2013 20:27:51 -0300
   4 Subject: [PATCH] drivers: clk: sunxi: Fix memory leakage in clk-sunxi.c
   5
   6 Fix a possible memory leak in sun4i_osc_clk_setup().
   7 Moved clock-frequency check to save superfluous allocation.
   8
   9 Signed-off-by: Victor N. Ramos Mello <victornrm@gmail.com>
  10 Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
  11 ---
  12  drivers/clk/sunxi/clk-sunxi.c | 28 +++++++++++++++++-----------
  13  1 file changed, 17 insertions(+), 11 deletions(-)
  14
  15 --- a/drivers/clk/sunxi/clk-sunxi.c
  16 +++ b/drivers/clk/sunxi/clk-sunxi.c
  17 @@ -37,18 +37,16 @@ static void __init sun4i_osc_clk_setup(s
  18         const char *clk_name = node->name;
  19         u32 rate;
  20
  21 +       if (of_property_read_u32(node, "clock-frequency", &rate))
  22 +               return;
  23 +
  24         /* allocate fixed-rate and gate clock structs */
  25         fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL);
  26         if (!fixed)
  27                 return;
  28         gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
  29 -       if (!gate) {
  30 -               kfree(fixed);
  31 -               return;
  32 -       }
  33 -
  34 -       if (of_property_read_u32(node, "clock-frequency", &rate))
  35 -               return;
  36 +       if (!gate)
  37 +               goto err_free_fixed;
  38
  39         /* set up gate and fixed rate properties */
  40         gate->reg = of_iomap(node, 0);
  41 @@ -63,10 +61,18 @@ static void __init sun4i_osc_clk_setup(s
  42                         &gate->hw, &clk_gate_ops,
  43                         CLK_IS_ROOT);
  44
  45 -       if (!IS_ERR(clk)) {
  46 -               of_clk_add_provider(node, of_clk_src_simple_get, clk);
  47 -               clk_register_clkdev(clk, clk_name, NULL);
  48 -       }
  49 +       if (IS_ERR(clk))
  50 +               goto err_free_gate;
  51 +
  52 +       of_clk_add_provider(node, of_clk_src_simple_get, clk);
  53 +       clk_register_clkdev(clk, clk_name, NULL);
  54 +
  55 +       return;
  56 +
  57 +err_free_gate:
  58 +       kfree(gate);
  59 +err_free_fixed:
  60 +       kfree(fixed);
  61  }
  62  CLK_OF_DECLARE(sun4i_osc, "allwinner,sun4i-osc-clk", sun4i_osc_clk_setup);
  63