On Thu, Apr 18, 2019 at 12:27:56PM +0200, Ulf Hansson wrote: > 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 >
Acked-by: Niklas Cassel <[email protected]>
