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

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In many of clk_disable() implementations, it is a no-op for a NULL
pointer input, but this is one of the exceptions.

Making it treewide consistent will allow clock consumers to call
clk_disable() without NULL pointer check.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
This commit is contained in:
Masahiro Yamada 2016-09-19 03:01:14 +09:00 committed by Greg Ungerer
parent 3ec53d6fce
commit 742859adc7
1 changed files with 4 additions and 0 deletions
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4
arch/m68k/coldfire/clk.c
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@ -101,6 +101,10 @@ EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk) void clk_disable(struct clk *clk)
{ {
unsigned long flags; unsigned long flags;
if (!clk)
return;
spin_lock_irqsave(&clk_lock, flags); spin_lock_irqsave(&clk_lock, flags);
if ((--clk->enabled == 0) && clk->clk_ops) if ((--clk->enabled == 0) && clk->clk_ops)
clk->clk_ops->disable(clk); clk->clk_ops->disable(clk);