ARM: mmp: let clk_disable() return immediately if clk is NULL

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: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
index ac6633d0b69bca52bc126b495cb2b40335ab73d9..28fe64c6e2f5c50bca23a8d9f973d79be88b555b 100644 (file)
--- a/arch/arm/mach-mmp/clock.c
+++ b/arch/arm/mach-mmp/clock.c
@@ -67,6 +67,9 @@ void clk_disable(struct clk *clk)
 {
        unsigned long flags;
 
+       if (!clk)
+               return;
+
        WARN_ON(clk->enabled == 0);
 
        spin_lock_irqsave(&clocks_lock, flags);