blackfin: bf609: 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. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Masahiro Yamada <[email protected]> Cc: Stephen Boyd <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Michael Turquette <[email protected]> Cc: Steven Miao <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
tdaven · May 3, 2017 · accce8e · accce8e
1 parent 672934d
commit accce8e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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);
 }