Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledfor...

[linux] / include / linux / device.h

diff --git a/include/linux/device.h b/include/linux/device.h
index 46a5672..30c4570 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -88,6 +88,8 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
  *
  * @suspend:   Called when a device on this bus wants to go to sleep mode.
  * @resume:    Called to bring a device on this bus out of sleep mode.
+ * @num_vf:    Called to find out how many virtual functions a device on this
+ *             bus supports.
  * @pm:                Power management operations of this bus, callback the specific
  *             device driver's pm-ops.
  * @iommu_ops:  IOMMU specific operations for this bus, used to attach IOMMU
@@ -127,6 +129,8 @@ struct bus_type {
        int (*suspend)(struct device *dev, pm_message_t state);
        int (*resume)(struct device *dev);
 
+       int (*num_vf)(struct device *dev);
+
        const struct dev_pm_ops *pm;
 
        const struct iommu_ops *iommu_ops;
@@ -1136,11 +1140,19 @@ static inline bool device_supports_offline(struct device *dev)
 extern void lock_device_hotplug(void);
 extern void unlock_device_hotplug(void);
 extern int lock_device_hotplug_sysfs(void);
+void assert_held_device_hotplug(void);
 extern int device_offline(struct device *dev);
 extern int device_online(struct device *dev);
 extern void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
 extern void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
 
+static inline int dev_num_vf(struct device *dev)
+{
+       if (dev->bus && dev->bus->num_vf)
+               return dev->bus->num_vf(dev);
+       return 0;
+}
+
 /*
  * Root device objects for grouping under /sys/devices
  */