From: Tony Prisk <linux@prisktech.co.nz>
Date: Fri, 17 May 2013 21:18:49 +0000 (+1200)
Subject: clk: vt8500: Fix unbalanced spinlock in vt8500_dclk_set_rate()
X-Git-Tag: v3.10-rc4~4^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=419e321df8d7d605f21f980903befc65ee66e848;p=linux.git

clk: vt8500: Fix unbalanced spinlock in vt8500_dclk_set_rate()

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@prisktech.co.nz>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
---

diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index debf688afa8e..553ac35bcc91 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);
 	vt8500_pmc_wait_busy();
 
-	spin_lock_irqsave(cdev->lock, flags);
+	spin_unlock_irqrestore(cdev->lock, flags);
 
 	return 0;
 }