From: Dexuan Cui <[email protected]> Sent: Monday, July 8, 2019 10:30 PM > > The high-level VSC drivers will implement device-specific callbacks. > > Signed-off-by: Dexuan Cui <[email protected]> > --- > drivers/hv/vmbus_drv.c | 42 ++++++++++++++++++++++++++++++++++++++++++ > include/linux/hyperv.h | 3 +++ > 2 files changed, 45 insertions(+) > > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c > index 1730e7b..e29e2171 100644 > --- a/drivers/hv/vmbus_drv.c > +++ b/drivers/hv/vmbus_drv.c > @@ -911,6 +911,43 @@ static void vmbus_shutdown(struct device *child_device) > drv->shutdown(dev); > } > > +/* > + * vmbus_suspend - Suspend a vmbus device > + */ > +static int vmbus_suspend(struct device *child_device) > +{ > + struct hv_driver *drv; > + struct hv_device *dev = device_to_hv_device(child_device); > + > + /* The device may not be attached yet */ > + if (!child_device->driver) > + return 0; > + > + drv = drv_to_hv_drv(child_device->driver); > + if (!drv->suspend) > + return -EOPNOTSUPP; > + > + return drv->suspend(dev); > +} > + > +/* > + * vmbus_resume - Resume a vmbus device > + */ > +static int vmbus_resume(struct device *child_device) > +{ > + struct hv_driver *drv; > + struct hv_device *dev = device_to_hv_device(child_device); > + > + /* The device may not be attached yet */ > + if (!child_device->driver) > + return 0; > + > + drv = drv_to_hv_drv(child_device->driver); > + if (!drv->resume) > + return -EOPNOTSUPP; > + > + return drv->resume(dev); > +} > > /* > * vmbus_device_release - Final callback release of the vmbus child device > @@ -926,6 +963,10 @@ static void vmbus_device_release(struct device *device) > kfree(hv_dev); > } > > +static const struct dev_pm_ops vmbus_pm = { > + SET_SYSTEM_SLEEP_PM_OPS(vmbus_suspend, vmbus_resume) > +}; > + > /* The one and only one */ > static struct bus_type hv_bus = { > .name = "vmbus", > @@ -936,6 +977,7 @@ static void vmbus_device_release(struct device *device) > .uevent = vmbus_uevent, > .dev_groups = vmbus_dev_groups, > .drv_groups = vmbus_drv_groups, > + .pm = &vmbus_pm, > }; > > struct onmessage_work_context { > diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h > index 6256cc3..94443c4 100644 > --- a/include/linux/hyperv.h > +++ b/include/linux/hyperv.h > @@ -1149,6 +1149,9 @@ struct hv_driver { > int (*remove)(struct hv_device *); > void (*shutdown)(struct hv_device *); > > + int (*suspend)(struct hv_device *); > + int (*resume)(struct hv_device *); > + > }; > > /* Base device object */ > -- > 1.8.3.1
Reviewed-by: Michael Kelley <[email protected]>
