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Message-Id: <1451297429-21689-15-git-send-email-yamada.masahiro@socionext.com>
Date: Mon, 28 Dec 2015 19:10:27 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: linux-mtd@...ts.infradead.org
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Michael Turquette <mturquette@...libre.com>,
linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 14/16] 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@...ionext.com>
---
Changes in v2:
- Fix a bug. Return -EINVAL when parent _is_ NULL.
drivers/clk/clk.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index efd093a..151cbe8 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1066,6 +1066,9 @@ static int clk_fetch_parent_index(struct clk_core *core,
{
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
--
1.9.1
--
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