From: Tero Kristo <t-kristo@ti.com>
Date: Tue, 25 Sep 2012 16:05:32 +0000 (+0300)
Subject: ARM: OMAP: clockdomain: Fix locking on _clkdm_clk_hwmod_enable / disable
X-Git-Tag: sz_161~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c07f62e87e36d218a4dcb164aa9cbc1f920cdd17;p=pandora-kernel.git

ARM: OMAP: clockdomain: Fix locking on _clkdm_clk_hwmod_enable / disable

Previously the code only acquired spinlock after increasing / decreasing
the usecount value, which is wrong. This leaves a small window where
a task switch may occur between the check of the usecount and the actual
wakeup / sleep of the domain. Fixed by moving the spinlock locking before
the usecount access. Left the usecount as atomic_t if someone wants an
easy access to the parameter through atomic_read.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---

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