clk: remove redundant negative index check in of_clk_get_parent_name()

This if-block can be dropped because the of_parse_phandle_with_args()
in the following line returns -EINVAL for negative index.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index f13c3f4..7429ede 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3062,9 +3062,6 @@ const char *of_clk_get_parent_name(struct device_node *np, int index)
        int count;
        struct clk *clk;
 
-       if (index < 0)
-               return NULL;
-
        rc = of_parse_phandle_with_args(np, "clocks", "#clock-cells", index,
                                        &clkspec);
        if (rc)