diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-05-01 23:33:53 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-05-05 23:51:50 +0400 |
| commit | efa6902501ffc87d69bfb10b8a09b7d6ee222d77 (patch) | |
| tree | 1fc2840dea09457e84c8b593e2ad7ff9f77ce501 /drivers/base | |
| parent | 23e0fc5ae64925e0ff1b6221b83dff1b217545df (diff) | |
| download | linux-efa6902501ffc87d69bfb10b8a09b7d6ee222d77.tar.xz | |
PM / Domains: Make device removal more straightforward
The removal of a device from a PM domain doesn't have to browse
the domain's device list, because it can check directly if the
device belongs to the given domain. Moreover, it should clear
the domain_data pointer in dev->power.subsys_data, because
dev_pm_put_subsys_data(dev) may not remove dev->power.subsys_data
and the stale domain data pointer may cause problems to happen.
Rework pm_genpd_remove_device() taking the above observations into
account.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 45c2b7f0fe3b..6ae5672c35ab 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1279,11 +1279,13 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, struct device *dev) { struct pm_domain_data *pdd; - int ret = -EINVAL; + int ret = 0; dev_dbg(dev, "%s()\n", __func__); - if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) + if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev) + || IS_ERR_OR_NULL(dev->pm_domain) + || pd_to_genpd(dev->pm_domain) != genpd) return -EINVAL; genpd_acquire_lock(genpd); @@ -1293,21 +1295,14 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, goto out; } - list_for_each_entry(pdd, &genpd->dev_list, list_node) { - if (pdd->dev != dev) - continue; - - list_del_init(&pdd->list_node); - pdd->dev = NULL; - dev_pm_put_subsys_data(dev); - dev->pm_domain = NULL; - kfree(to_gpd_data(pdd)); - - genpd->device_count--; + dev->pm_domain = NULL; + pdd = dev->power.subsys_data->domain_data; + list_del_init(&pdd->list_node); + dev->power.subsys_data->domain_data = NULL; + dev_pm_put_subsys_data(dev); + kfree(to_gpd_data(pdd)); - ret = 0; - break; - } + genpd->device_count--; out: genpd_release_lock(genpd); |