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PM / OPP: Free resources and properly return error on failure

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_of_init_opp_table_v2() isn't freeing up resources on some errors and
the error values returned are also not correct always.

This fixes following problems:
- Return -ENOENT, if no entries are found in the table.
- Use IS_ERR() to properly check return value of _find_device_opp().
- Return error value with PTR_ERR() in above case.
- Free table if _find_device_opp() fails.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2015-08-12 16:30:18 +05:30 committed by Rafael J. Wysocki
parent 21c36d3571
commit 1f821ed7af
1 changed files with 17 additions and 15 deletions
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24
drivers/base/power/opp.c
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@ -1323,28 +1323,30 @@ static int _of_init_opp_table_v2(struct device *dev,
if (ret) {
dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
ret);
break;
goto free_table;
}
}
/* There should be one of more OPP defined */
if (WARN_ON(!count))
if (WARN_ON(!count)) {
ret = -ENOENT;
goto put_opp_np;
}
if (!ret) {
if (!dev_opp) {
dev_opp = _find_device_opp(dev);
if (WARN_ON(!dev_opp))
goto put_opp_np;
if (WARN_ON(IS_ERR(dev_opp))) {
ret = PTR_ERR(dev_opp);
goto free_table;
}
dev_opp->np = opp_np;
dev_opp->shared_opp = of_property_read_bool(opp_np,
"opp-shared");
} else {
of_free_opp_table(dev);
}
dev_opp->shared_opp = of_property_read_bool(opp_np, "opp-shared");
of_node_put(opp_np);
return 0;
free_table:
of_free_opp_table(dev);
put_opp_np:
of_node_put(opp_np);