[PATCH v4] blackfin: bf609: let clk_disable() return immediately if clk is NULL

[Masahiro Yamada]

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>
---

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/blackfin/mach-bf609/clock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/blackfin/mach-bf609/clock.c b/arch/blackfin/mach-bf609/clock.c
index 3783058..392a59b 100644
--- a/arch/blackfin/mach-bf609/clock.c
+++ b/arch/blackfin/mach-bf609/clock.c
@@ -97,6 +97,9 @@ EXPORT_SYMBOL(clk_enable);
 
 void clk_disable(struct clk *clk)
 {
+	if (!clk)
+		return;
+
 	if (clk->ops && clk->ops->disable)
 		clk->ops->disable(clk);
 }
-- 
1.9.1