[v.1] clk:clk-rockchip:-of_iomap failed to remap then abort clock initialization.

[Arvind Yadav]

-check return of 'of_iomap'.if It's falied to remap then abort.

-Unmap a region obtained by remap. iounmap frees the mapping when failed
to allocate the memory.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/clk/rockchip/clk-rockchip.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk-rockchip.c 
b/drivers/clk/rockchip/clk-rockchip.c
index 4cf838d5..2c9bb81 100644
--- a/drivers/clk/rockchip/clk-rockchip.c
+++ b/drivers/clk/rockchip/clk-rockchip.c
@@ -49,14 +49,19 @@ static void __init rk2928_gate_clk_init(struct device_node 
*node)
        }
 
        reg = of_iomap(node, 0);
+       if (!reg)
+               return;
 
        clk_data = kzalloc(sizeof(struct clk_onecell_data), GFP_KERNEL);
-       if (!clk_data)
+       if (!clk_data) {
+               iounmap(reg);
                return;
+       }
 
        clk_data->clks = kzalloc(qty * sizeof(struct clk *), GFP_KERNEL);
        if (!clk_data->clks) {
                kfree(clk_data);
+               iounmap(reg);
                return;
        }
 
-- 
2.7.4