Commit c1fb1bf6 authored by Defang Bo's avatar Defang Bo Committed by Greg Ungerer
Browse files

m68k: let clk_enable() return immediately if clk is NULL 



Similar to commit<742859ad>("m68k: let clk_disable() return immediately if clk is NULL").
there should be a check for clk to prevent NULL pointer dereference.

Signed-off-by: default avatarDefang Bo <bodefang@126.com>
Signed-off-by: default avatarGreg Ungerer <gerg@linux-m68k.org>
parent 92bf2261

arch/m68k/coldfire/clk.c

+4 −0
Original line number Diff line number Diff line
@@ -90,6 +90,10 @@ EXPORT_SYMBOL(clk_get); 
int clk_enable(struct clk *clk)

{

	unsigned long flags;



	if (!clk)

		return -EINVAL;



	spin_lock_irqsave(&clk_lock, flags);

	if ((clk->enabled++ == 0) && clk->clk_ops)

		clk->clk_ops->enable(clk);