[PATCH 1/4] clk: vt8500: Fix unbalanced spinlock in vt8500_dclk_set_rate()

From: Tony Prisk
Date: Fri May 17 2013 - 17:20:27 EST

With the addition of a DVO clock, a bug is now evident in the vt8500
clock code:
[ 0.290000] WARNING: at init/main.c:698 do_one_initcall+0x158/0x18c()
[ 0.300000] initcall wm8505fb_driver_init+0x0/0xc returned with disabled int

This is caused by an unbalanced spinlock in vt8500_dclk_set_rate().
Replace the second call to spin_lock_irqsave() with spin_unlock_irqrestore().

Signed-off-by: Tony Prisk <linux@xxxxxxxxxxxxxxx>
drivers/clk/clk-vt8500.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index debf688..553ac35 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -183,7 +183,7 @@ static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
writel(divisor, cdev->div_reg);

- spin_lock_irqsave(cdev->lock, flags);
+ spin_unlock_irqrestore(cdev->lock, flags);

return 0;

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