[PATCH v4] m68k: let clk_disable() return immediately if clk is NULL

From: Masahiro Yamada
Date: Sun Sep 18 2016 - 14:02:13 EST

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@xxxxxxxxxxxxx>
Acked-by: Greg Ungerer <gerg@xxxxxxxxxxx>

Changes in v4:
- Split into per-arch patches

Changes in v3:
- Return only when clk is NULL. Do not take care of error pointer.

Changes in v2:
- Rebase on Linux 4.6-rc1

arch/m68k/coldfire/clk.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/m68k/coldfire/clk.c b/arch/m68k/coldfire/clk.c
index fddfdcc..1e3c7e9 100644
--- a/arch/m68k/coldfire/clk.c
+++ b/arch/m68k/coldfire/clk.c
@@ -101,6 +101,10 @@ EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
unsigned long flags;
+ if (!clk)
+ return;
spin_lock_irqsave(&clk_lock, flags);
if ((--clk->enabled == 0) && clk->clk_ops)