From: Francesco VIRLINZI <francesco.virlinzi@st.com>
Date: Fri, 13 Mar 2009 08:08:01 +0000 (+0000)
Subject: sh: clkfwk: Safer resume from hibernation.
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=50cca715a64b66ccf173767d94d4020ea0a6129c;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

sh: clkfwk: Safer resume from hibernation.

This patch fixes a possible problem in the resume from
hibenration. It temporaneally saves the clk->rate on the
stack to avoid any possible change during the clk->set_parent(..)
call.

Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index 3209a8740fa4..1dc896483b59 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -372,12 +372,14 @@ static int clks_sysdev_suspend(struct sys_device *dev, pm_message_t state)
 		if (prev_state.event == PM_EVENT_FREEZE) {
 			list_for_each_entry(clkp, &clock_list, node)
 				if (likely(clkp->ops)) {
+					unsigned long rate = clkp->rate;
+
 					if (likely(clkp->ops->set_parent))
 						clkp->ops->set_parent(clkp,
 							clkp->parent);
 					if (likely(clkp->ops->set_rate))
 						clkp->ops->set_rate(clkp,
-							clkp->rate, NO_CHANGE);
+							rate, NO_CHANGE);
 					else if (likely(clkp->ops->recalc))
 						clkp->ops->recalc(clkp);
 					}