clk: make sure parent is not NULL in clk_fetch_parent_index()
If parent is given with NULL, clk_fetch_parent_index() could return
a positive index value.
Currently, parent is checked by the callers of this function, but
it would be safer to do it in this function.
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 0382046..da7c9a5 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1066,6 +1066,9 @@
{
int i;
+ if (!parent)
+ return -EINVAL;
+
/*
* find index of new parent clock using cached parent ptrs,
* or if not yet cached, use string name comparison and cache