Commit b2274ddfdf32d3561ebdd9a298c98e29da768b5a
Committed by
Afzal Mohammed
Afzal Mohammed
1 parent
b481fea7d9
Exists in
master
OMAP2+: PM: secure OPP access using rcu locks
OPP functions as described in Documentation/power/opp.txt should be accessed under rcu_locks. Signed-off-by: Nishanth Menon <nm@ti.com> [vaibhav.bedia@ti.com: Pull in for AM33xx] Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Showing 1 changed file with 4 additions and 1 deletions Side-by-side Diff
arch/arm/mach-omap2/pm.c
| ... | ... | @@ -172,14 +172,17 @@ |
| 172 | 172 | freq = clk->rate; |
| 173 | 173 | clk_put(clk); |
| 174 | 174 | |
| 175 | + rcu_read_lock(); | |
| 175 | 176 | opp = opp_find_freq_ceil(dev, &freq); |
| 176 | 177 | if (IS_ERR(opp)) { |
| 177 | - pr_err("%s: unable to find boot up OPP for vdd_%s\n", | |
| 178 | + rcu_read_unlock(); | |
| 179 | + printk(KERN_ERR "%s: unable to find boot up OPP for vdd_%s\n", | |
| 178 | 180 | __func__, vdd_name); |
| 179 | 181 | goto exit; |
| 180 | 182 | } |
| 181 | 183 | |
| 182 | 184 | bootup_volt = opp_get_voltage(opp); |
| 185 | + rcu_read_unlock(); | |
| 183 | 186 | if (!bootup_volt) { |
| 184 | 187 | pr_err("%s: unable to find voltage corresponding " |
| 185 | 188 | "to the bootup OPP for vdd_%s\n", __func__, vdd_name); |