Messages in this thread Patch in this message | | | From | Defang Bo <> | Subject | [PATCH 2/2] m68k: let clk_enable() return immediately if clk is NULL | Date | Sun, 27 Dec 2020 22:35:53 +0800 |
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There should be a check for clk to prevent NULL pointer dereference.
Signed-off-by: Defang Bo <bodefang@126.com> --- arch/m68k/coldfire/clk.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/m68k/coldfire/clk.c b/arch/m68k/coldfire/clk.c index 7bc666e..cf1ed97 100644 --- a/arch/m68k/coldfire/clk.c +++ b/arch/m68k/coldfire/clk.c @@ -90,6 +90,9 @@ EXPORT_SYMBOL(clk_get); int clk_enable(struct clk *clk) { unsigned long flags; + if (!clk) + return; + spin_lock_irqsave(&clk_lock, flags); if ((clk->enabled++ == 0) && clk->clk_ops) clk->clk_ops->enable(clk); -- 2.7.4
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