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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2015-11-05 14:21:20 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-06 23:59:41 +0100 |
| commit | 4a3a1353a84796f93d389694e3b87ede533953fe (patch) | |
| tree | f08505c56b832ba502db242a081ad06757ec2451 /drivers/base | |
| parent | 87b4115db0239865bc812f61704bb1f43e2439b6 (diff) | |
| download | linux-stable-4a3a1353a84796f93d389694e3b87ede533953fe.tar.gz linux-stable-4a3a1353a84796f93d389694e3b87ede533953fe.tar.bz2 linux-stable-4a3a1353a84796f93d389694e3b87ede533953fe.zip | |
PM / OPP: Hold dev_opp_list_lock for writers
Writers need to update OPP device and their list with dev_opp_list_lock
mutex held, which was missed at few places. Fix it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.3 <stable@vger.kernel.org> # 4.3
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/opp/core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index 252706d6f60b..d5f215679820 100644 --- a/drivers/base/power/opp/core.c +++ b/drivers/base/power/opp/core.c @@ -1168,13 +1168,17 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np) struct device_opp *dev_opp; int ret = 0, count = 0; + mutex_lock(&dev_opp_list_lock); + dev_opp = _managed_opp(opp_np); if (dev_opp) { /* OPPs are already managed */ if (!_add_list_dev(dev, dev_opp)) ret = -ENOMEM; + mutex_unlock(&dev_opp_list_lock); return ret; } + mutex_unlock(&dev_opp_list_lock); /* We have opp-list node now, iterate over it and add OPPs */ for_each_available_child_of_node(opp_np, np) { @@ -1192,15 +1196,20 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np) if (WARN_ON(!count)) return -ENOENT; + mutex_lock(&dev_opp_list_lock); + dev_opp = _find_device_opp(dev); if (WARN_ON(IS_ERR(dev_opp))) { ret = PTR_ERR(dev_opp); + mutex_unlock(&dev_opp_list_lock); goto free_table; } dev_opp->np = opp_np; dev_opp->shared_opp = of_property_read_bool(opp_np, "opp-shared"); + mutex_unlock(&dev_opp_list_lock); + return 0; free_table: |