clk: slightly optimize clk_core_set_parent()

If clk_fetch_parent_index() fails, p_rate is unused.  Move the
assignment after the error checking.

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

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 82b79a6..d31ed95 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1748,13 +1748,13 @@ static int clk_core_set_parent(struct clk_core *core, struct clk_core *parent)
        /* try finding the new parent index */
        if (parent) {
                p_index = clk_fetch_parent_index(core, parent);
-               p_rate = parent->rate;
                if (p_index < 0) {
                        pr_debug("%s: clk %s can not be parent of clk %s\n",
                                        __func__, parent->name, core->name);
                        ret = p_index;
                        goto out;
                }
+               p_rate = parent->rate;
        }
 
        /* propagate PRE_RATE_CHANGE notifications */