From: Eric Farman <farman@linux.ibm.com>
Date: Thu, 7 Jul 2022 15:57:32 +0200
Subject: vfio/ccw: Flatten MDEV device (un)register
Git-commit: 09205a7659714c14591c274fdbdfa97a20f4cef2
Patch-mainline: v6.0-rc1
References: bsc#1205701

The vfio_ccw_mdev_(un)reg routines are merely vfio-ccw routines that
pass control to mdev_(un)register_device. Since there's only one
caller of each, let's just call the mdev routines directly.

Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220707135737.720765-7-farman@linux.ibm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/s390/cio/vfio_ccw_drv.c     |  4 ++--
 drivers/s390/cio/vfio_ccw_ops.c     | 10 ----------
 drivers/s390/cio/vfio_ccw_private.h |  3 ---
 3 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 279ad2161f17..fe87a2652a22 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -240,7 +240,7 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
 
 	private->state = VFIO_CCW_STATE_STANDBY;
 
-	ret = vfio_ccw_mdev_reg(sch);
+	ret = mdev_register_device(&sch->dev, &vfio_ccw_mdev_driver);
 	if (ret)
 		goto out_disable;
 
@@ -262,7 +262,7 @@ static void vfio_ccw_sch_remove(struct subchannel *sch)
 	struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
 
 	vfio_ccw_sch_quiesce(sch);
-	vfio_ccw_mdev_unreg(sch);
+	mdev_unregister_device(&sch->dev);
 
 	dev_set_drvdata(&sch->dev, NULL);
 
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c
index 81377270d4a7..a7ea9358e461 100644
--- a/drivers/s390/cio/vfio_ccw_ops.c
+++ b/drivers/s390/cio/vfio_ccw_ops.c
@@ -654,13 +654,3 @@ struct mdev_driver vfio_ccw_mdev_driver = {
 	.remove = vfio_ccw_mdev_remove,
 	.supported_type_groups  = mdev_type_groups,
 };
-
-int vfio_ccw_mdev_reg(struct subchannel *sch)
-{
-	return mdev_register_device(&sch->dev, &vfio_ccw_mdev_driver);
-}
-
-void vfio_ccw_mdev_unreg(struct subchannel *sch)
-{
-	mdev_unregister_device(&sch->dev);
-}
diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h
index 5891bea8ce41..a2584c130e79 100644
--- a/drivers/s390/cio/vfio_ccw_private.h
+++ b/drivers/s390/cio/vfio_ccw_private.h
@@ -117,9 +117,6 @@ struct vfio_ccw_private {
 	struct work_struct	crw_work;
 } __aligned(8);
 
-int vfio_ccw_mdev_reg(struct subchannel *sch);
-void vfio_ccw_mdev_unreg(struct subchannel *sch);
-
 int vfio_ccw_sch_quiesce(struct subchannel *sch);
 
 extern struct mdev_driver vfio_ccw_mdev_driver;