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ARM: OMAP: add RCU locking to omap2_set_init_voltage. 

opp_find_freq_ceil and opp_get_voltage are documented as requiring
rcu_lock to be held.  So hold it.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
NeilBrown 2012-01-09 13:14:12 +11:00 committed by Kevin Hilman
parent d65b4e98d7
commit 6369fd41fc
1 changed files with 3 additions and 0 deletions
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3
arch/arm/mach-omap2/pm.c
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@ -174,14 +174,17 @@ static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
freq = clk->rate;
clk_put(clk);
rcu_read_lock();
opp = opp_find_freq_ceil(dev, &freq);
if (IS_ERR(opp)) {
rcu_read_unlock();
pr_err("%s: unable to find boot up OPP for vdd_%s\n",
__func__, vdd_name);
goto exit;
}
bootup_volt = opp_get_voltage(opp);
rcu_read_unlock();
if (!bootup_volt) {
pr_err("%s: unable to find voltage corresponding "
"to the bootup OPP for vdd_%s\n", __func__, vdd_name);