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authorPeng Fan <peng.fan@nxp.com>2018-01-02 15:25:36 +0800
committerAnatolij Gustschin <agust@denx.de>2018-01-03 09:46:52 +0100
commitcca3ff054ab3e1f5f0d3f2d58da263cae201db50 (patch)
tree463dba72c323aed737afe74110cdb8618cc33d65
parent1314bd1192b4c67d28bdae7eee639588e88090cd (diff)
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 <peng.fan@nxp.com> Signed-off-by: Anatolij Gustschin <agust@denx.de>
-rw-r--r--drivers/video/ipu_common.c6
1 files changed, 5 insertions, 1 deletions
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;
}