clk: mediatek: fix of_iomap memory leak

Smatch reports:
drivers/clk/mediatek/clk-mtk.c:583 mtk_clk_simple_probe() warn:
    'base' from of_iomap() not released on lines: 496.

This problem was also found in linux-next. In mtk_clk_simple_probe(),
base is not released when handling errors
if clk_data is not existed, which may cause a leak.
So free_base should be added here to release base.

Fixes: c58cd0e40ffa ("clk: mediatek: Add mtk_clk_simple_probe() to simplify clock providers")
Signed-off-by: Bosi Zhang <u201911157@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Link: https://lore.kernel.org/r/20230422084331.47198-1-u201911157@hust.edu.cn
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index fd2214c..3c50f48 100644 (file)
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -500,8 +500,10 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
        num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
 
        clk_data = mtk_alloc_clk_data(num_clks);
-       if (!clk_data)
-               return -ENOMEM;
+       if (!clk_data) {
+               r = -ENOMEM;
+               goto free_base;
+       }
 
        if (mcd->fixed_clks) {
                r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
@@ -599,6 +601,7 @@ unregister_fixed_clks:
                                              mcd->num_fixed_clks, clk_data);
 free_data:
        mtk_free_clk_data(clk_data);
+free_base:
        if (mcd->shared_io && base)
                iounmap(base);
        return r;