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video: ipu: Fix dereferencing NULL pointer problem

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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>
This commit is contained in:
Peng Fan 2018-01-02 15:25:36 +08:00 committed by Anatolij Gustschin
parent 1314bd1192
commit cca3ff054a
1 changed files with 5 additions and 1 deletions
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6
drivers/video/ipu_common.c
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@ -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;
}