ARM: OMAP: Add sanity check to clk_disable

BUG() if the clock use count is already zero.

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 7f45c7c3e673..4abf2714f2d9 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -100,6 +100,7 @@ void clk_disable(struct clk *clk)
                 return;
 
         spin_lock_irqsave(&clockfw_lock, flags);
+        BUG_ON(clk->usecount == 0);
         if (arch_clock->clk_disable)
                 arch_clock->clk_disable(clk);
         spin_unlock_irqrestore(&clockfw_lock, flags);