From cca3ff054ab3e1f5f0d3f2d58da263cae201db50 Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Tue, 2 Jan 2018 15:25:36 +0800 Subject: [PATCH] video: ipu: Fix dereferencing NULL pointer problem The clk_set_rate function dereferences the clk pointer without checking whether it is NULL. This may cause problem when clk is NULL. Signed-off-by: Peng Fan Signed-off-by: Anatolij Gustschin --- drivers/video/ipu_common.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/video/ipu_common.c b/drivers/video/ipu_common.c index 96229da502..889085aa76 100644 --- a/drivers/video/ipu_common.c +++ b/drivers/video/ipu_common.c @@ -132,8 +132,12 @@ struct clk *clk_get_parent(struct clk *clk) int clk_set_rate(struct clk *clk, unsigned long rate) { - if (clk && clk->set_rate) + if (!clk) + return 0; + + if (clk->set_rate) clk->set_rate(clk, rate); + return clk->rate; } -- 2.39.5