vfio/mdev: remove mdev_from_dev

Just open code it in the only caller.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Jason Gunthorpe <[e-mail]>
Reviewed-by: Kevin Tian <[e-mail]>
Reviewed-by: Kirti Wankhede <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alex Williamson <[e-mail]>

drivers/vfio/mdev/mdev_core.c

···
 
 static int mdev_device_remove_cb(struct device *dev, void *data)
 {
-	struct mdev_device *mdev = mdev_from_dev(dev);
-
-	if (mdev)
-		mdev_device_remove_common(mdev);
+	if (dev->bus == &mdev_bus_type)
+		mdev_device_remove_common(to_mdev_device(dev));
 	return 0;
 }
 

include/linux/mdev.h

···
 {
 	return &mdev->dev;
 }
-static inline struct mdev_device *mdev_from_dev(struct device *dev)
-{
-	return dev->bus == &mdev_bus_type ? to_mdev_device(dev) : NULL;
-}
 
 #endif /* MDEV_H */