[v2,6/7] vfio/ccw: replace vfio_init_device with _alloc_
Commit Message
Now that we have a reasonable separation of structs that follow
the subchannel and mdev lifecycles, there's no reason we can't
call the official vfio_alloc_device routine for our private data,
and behave like everyone else.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
---
drivers/s390/cio/vfio_ccw_drv.c | 18 ------------------
drivers/s390/cio/vfio_ccw_ops.c | 28 ++++++++++++++++++----------
drivers/s390/cio/vfio_ccw_private.h | 2 --
drivers/vfio/vfio_main.c | 10 +++++-----
include/linux/vfio.h | 2 --
5 files changed, 23 insertions(+), 37 deletions(-)
Comments
On 11/2/22 11:01 AM, Eric Farman wrote:
> Now that we have a reasonable separation of structs that follow
> the subchannel and mdev lifecycles, there's no reason we can't
> call the official vfio_alloc_device routine for our private data,
> and behave like everyone else.
>
> Signed-off-by: Eric Farman <farman@linux.ibm.com>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> ---
> drivers/s390/cio/vfio_ccw_drv.c | 18 ------------------
> drivers/s390/cio/vfio_ccw_ops.c | 28 ++++++++++++++++++----------
> drivers/s390/cio/vfio_ccw_private.h | 2 --
> drivers/vfio/vfio_main.c | 10 +++++-----
> include/linux/vfio.h | 2 --
> 5 files changed, 23 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
> index 041cc0860f0e..fd58c0f4f8cc 100644
> --- a/drivers/s390/cio/vfio_ccw_drv.c
> +++ b/drivers/s390/cio/vfio_ccw_drv.c
> @@ -151,24 +151,6 @@ static void vfio_ccw_sch_irq(struct subchannel *sch)
> vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT);
> }
>
> -void vfio_ccw_free_private(struct vfio_ccw_private *private)
> -{
> - struct vfio_ccw_crw *crw, *temp;
> -
> - list_for_each_entry_safe(crw, temp, &private->crw, next) {
> - list_del(&crw->next);
> - kfree(crw);
> - }
> -
> - kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
> - kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
> - kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
> - kmem_cache_free(vfio_ccw_io_region, private->io_region);
> - kfree(private->cp.guest_cp);
> - mutex_destroy(&private->io_mutex);
> - kfree(private);
> -}
> -
> static void vfio_ccw_free_parent(struct device *dev)
> {
> struct vfio_ccw_parent *parent = container_of(dev, struct vfio_ccw_parent, dev);
> diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c
> index 8a929a9cf3c6..1155f8bcedd9 100644
> --- a/drivers/s390/cio/vfio_ccw_ops.c
> +++ b/drivers/s390/cio/vfio_ccw_ops.c
> @@ -102,15 +102,10 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev)
> struct vfio_ccw_private *private;
> int ret;
>
> - private = kzalloc(sizeof(*private), GFP_KERNEL);
> - if (!private)
> - return -ENOMEM;
> -
> - ret = vfio_init_device(&private->vdev, &mdev->dev, &vfio_ccw_dev_ops);
> - if (ret) {
> - kfree(private);
> - return ret;
> - }
> + private = vfio_alloc_device(vfio_ccw_private, vdev, &mdev->dev,
> + &vfio_ccw_dev_ops);
> + if (IS_ERR(private))
> + return PTR_ERR(private);
OK, and now it makes sense to switch to IS_ERR since _vfio_alloc_device uses ERR_PTR.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
@@ -151,24 +151,6 @@ static void vfio_ccw_sch_irq(struct subchannel *sch)
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT);
}
-void vfio_ccw_free_private(struct vfio_ccw_private *private)
-{
- struct vfio_ccw_crw *crw, *temp;
-
- list_for_each_entry_safe(crw, temp, &private->crw, next) {
- list_del(&crw->next);
- kfree(crw);
- }
-
- kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
- kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
- kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
- kmem_cache_free(vfio_ccw_io_region, private->io_region);
- kfree(private->cp.guest_cp);
- mutex_destroy(&private->io_mutex);
- kfree(private);
-}
-
static void vfio_ccw_free_parent(struct device *dev)
{
struct vfio_ccw_parent *parent = container_of(dev, struct vfio_ccw_parent, dev);
@@ -102,15 +102,10 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev)
struct vfio_ccw_private *private;
int ret;
- private = kzalloc(sizeof(*private), GFP_KERNEL);
- if (!private)
- return -ENOMEM;
-
- ret = vfio_init_device(&private->vdev, &mdev->dev, &vfio_ccw_dev_ops);
- if (ret) {
- kfree(private);
- return ret;
- }
+ private = vfio_alloc_device(vfio_ccw_private, vdev, &mdev->dev,
+ &vfio_ccw_dev_ops);
+ if (IS_ERR(private))
+ return PTR_ERR(private);
dev_set_drvdata(&parent->dev, private);
@@ -135,8 +130,21 @@ static void vfio_ccw_mdev_release_dev(struct vfio_device *vdev)
{
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
+ struct vfio_ccw_crw *crw, *temp;
+
+ list_for_each_entry_safe(crw, temp, &private->crw, next) {
+ list_del(&crw->next);
+ kfree(crw);
+ }
+
+ kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
+ kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
+ kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
+ kmem_cache_free(vfio_ccw_io_region, private->io_region);
+ kfree(private->cp.guest_cp);
+ mutex_destroy(&private->io_mutex);
- vfio_ccw_free_private(private);
+ vfio_free_device(vdev);
}
static void vfio_ccw_mdev_remove(struct mdev_device *mdev)
@@ -131,8 +131,6 @@ int vfio_ccw_sch_quiesce(struct subchannel *sch);
void vfio_ccw_sch_io_todo(struct work_struct *work);
void vfio_ccw_crw_todo(struct work_struct *work);
-void vfio_ccw_free_private(struct vfio_ccw_private *private);
-
extern struct mdev_driver vfio_ccw_mdev_driver;
/*
@@ -348,6 +348,9 @@ static void vfio_device_release(struct device *dev)
device->ops->release(device);
}
+static int vfio_init_device(struct vfio_device *device, struct device *dev,
+ const struct vfio_device_ops *ops);
+
/*
* Allocate and initialize vfio_device so it can be registered to vfio
* core.
@@ -386,11 +389,9 @@ EXPORT_SYMBOL_GPL(_vfio_alloc_device);
/*
* Initialize a vfio_device so it can be registered to vfio core.
- *
- * Only vfio-ccw driver should call this interface.
*/
-int vfio_init_device(struct vfio_device *device, struct device *dev,
- const struct vfio_device_ops *ops)
+static int vfio_init_device(struct vfio_device *device, struct device *dev,
+ const struct vfio_device_ops *ops)
{
int ret;
@@ -422,7 +423,6 @@ int vfio_init_device(struct vfio_device *device, struct device *dev,
ida_free(&vfio.device_ida, device->index);
return ret;
}
-EXPORT_SYMBOL_GPL(vfio_init_device);
/*
* The helper called by driver @release callback to free the device
@@ -176,8 +176,6 @@ struct vfio_device *_vfio_alloc_device(size_t size, struct device *dev,
dev, ops), \
struct dev_struct, member)
-int vfio_init_device(struct vfio_device *device, struct device *dev,
- const struct vfio_device_ops *ops);
void vfio_free_device(struct vfio_device *device);
static inline void vfio_put_device(struct vfio_device *device)
{