[AVR32] Warn, don't BUG if clk_disable is called too many times



Print a helpful warning along with a stack dump if clk_disable is
called on a already-disabled clock. Remove the BUG_ON().

Extracted from a patch by David Brownell.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

parent 7a5fe238

arch/avr32/mach-at32ap/clock.c

+5 −1

Original line number	Original line	Diff line number	Diff line
	@@ -63,7 +63,11 @@ EXPORT_SYMBOL(clk_enable);

	static void __clk_disable(struct clk *clk)		static void __clk_disable(struct clk *clk)
	{		{
	BUG_ON(clk->users == 0);		if (clk->users == 0) {
			printk(KERN_ERR "%s: mismatched disable\n", clk->name);
			WARN_ON(1);
			return;
			}

	if (--clk->users == 0 && clk->mode)		if (--clk->users == 0 && clk->mode)
	clk->mode(clk, 0);		clk->mode(clk, 0);