A genpd provider that uses the ->attach_dev() callback to lookup resources for a device, fails to do so when the device has multiple PM domains. This is because when genpd invokes the ->attach_dev() callback, it passes the allocated virtual device as the in-parameter.
To address this problem, let's simply assign the dev->of_node for the virtual device, based upon the original device's OF node. Signed-off-by: Ulf Hansson <[email protected]> --- drivers/base/power/domain.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 7fec69aebf46..801f31c87d16 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2345,6 +2345,7 @@ EXPORT_SYMBOL_GPL(of_genpd_remove_last); static void genpd_release_dev(struct device *dev) { + of_node_put(dev->of_node); kfree(dev); } @@ -2406,14 +2407,14 @@ static void genpd_dev_pm_sync(struct device *dev) genpd_queue_power_off_work(pd); } -static int __genpd_dev_pm_attach(struct device *dev, struct device_node *np, - unsigned int index, bool power_on) +static int __genpd_dev_pm_attach(struct device *dev, unsigned int index, + bool power_on) { struct of_phandle_args pd_args; struct generic_pm_domain *pd; int ret; - ret = of_parse_phandle_with_args(np, "power-domains", + ret = of_parse_phandle_with_args(dev->of_node, "power-domains", "#power-domain-cells", index, &pd_args); if (ret < 0) return ret; @@ -2481,7 +2482,7 @@ int genpd_dev_pm_attach(struct device *dev) "#power-domain-cells") != 1) return 0; - return __genpd_dev_pm_attach(dev, dev->of_node, 0, true); + return __genpd_dev_pm_attach(dev, 0, true); } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach); @@ -2525,6 +2526,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, dev_set_name(virt_dev, "genpd:%u:%s", index, dev_name(dev)); virt_dev->bus = &genpd_bus_type; virt_dev->release = genpd_release_dev; + virt_dev->of_node = of_node_get(dev->of_node); ret = device_register(virt_dev); if (ret) { @@ -2533,7 +2535,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, } /* Try to attach the device to the PM domain at the specified index. */ - ret = __genpd_dev_pm_attach(virt_dev, dev->of_node, index, false); + ret = __genpd_dev_pm_attach(virt_dev, index, false); if (ret < 1) { device_unregister(virt_dev); return ret ? ERR_PTR(ret) : NULL; -- 2.17.1
