Commit 508f884a authored Dec 28, 2015 by Masahiro Yamada Committed by Stephen Boyd Feb 02, 2016

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>

parent 0e8f6e49

drivers/clk/clk.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1066,6 +1066,9 @@ static int clk_fetch_parent_index(struct clk_core *core,
	{		{
	int i;		int i;

			if (!parent)
			return -EINVAL;

	/*		/*
	* find index of new parent clock using cached parent ptrs,		* find index of new parent clock using cached parent ptrs,
	* or if not yet cached, use string name comparison and cache		* or if not yet cached, use string name comparison and cache