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-rw-r--r--Documentation/vfio-mediated-device.txt3
-rw-r--r--drivers/gpu/drm/i915/gvt/kvmgt.c2
-rw-r--r--drivers/vfio/mdev/mdev_core.c6
-rw-r--r--drivers/vfio/mdev/mdev_private.h10
-rw-r--r--include/linux/mdev.h15
-rw-r--r--samples/vfio-mdev/mtty.c2
6 files changed, 23 insertions, 15 deletions
diff --git a/Documentation/vfio-mediated-device.txt b/Documentation/vfio-mediated-device.txt
index cfee106a3679..d226c7a5ba8b 100644
--- a/Documentation/vfio-mediated-device.txt
+++ b/Documentation/vfio-mediated-device.txt
@@ -223,6 +223,9 @@ Directories and files under the sysfs for Each Physical Device
sprintf(buf, "%s-%s", dev_driver_string(parent->dev), group->name);
+ (or using mdev_parent_dev(mdev) to arrive at the parent device outside
+ of the core mdev code)
+
* device_api
This attribute should show which device API is being created, for example,
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 081ada238107..38500329aa92 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -396,7 +396,7 @@ static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev)
struct device *pdev;
void *gvt;
- pdev = mdev->parent->dev;
+ pdev = mdev_parent_dev(mdev);
gvt = kdev_to_i915(pdev)->gvt;
type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index bf3b3b0b3d2b..30d05304241e 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -30,6 +30,12 @@ static struct class_compat *mdev_bus_compat_class;
static LIST_HEAD(mdev_list);
static DEFINE_MUTEX(mdev_list_lock);
+struct device *mdev_parent_dev(struct mdev_device *mdev)
+{
+ return mdev->parent->dev;
+}
+EXPORT_SYMBOL(mdev_parent_dev);
+
static int _find_mdev_device(struct device *dev, void *data)
{
struct mdev_device *mdev;
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index 0b72c2d9ee40..b05dd22fc9a6 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -16,6 +16,16 @@
int mdev_bus_register(void);
void mdev_bus_unregister(void);
+struct mdev_parent {
+ struct device *dev;
+ const struct mdev_parent_ops *ops;
+ struct kref ref;
+ struct mutex lock;
+ struct list_head next;
+ struct kset *mdev_types_kset;
+ struct list_head type_list;
+};
+
struct mdev_type {
struct kobject kobj;
struct kobject *devices_kobj;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 853bb78e5866..f586222b6c25 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -13,19 +13,6 @@
#ifndef MDEV_H
#define MDEV_H
-/* Parent device */
-struct mdev_parent {
- struct device *dev;
- const struct mdev_parent_ops *ops;
-
- /* internal */
- struct kref ref;
- struct mutex lock;
- struct list_head next;
- struct kset *mdev_types_kset;
- struct list_head type_list;
-};
-
/* Mediated device */
struct mdev_device {
struct device dev;
@@ -165,4 +152,6 @@ extern void mdev_unregister_device(struct device *dev);
extern int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
extern void mdev_unregister_driver(struct mdev_driver *drv);
+extern struct device *mdev_parent_dev(struct mdev_device *mdev);
+
#endif /* MDEV_H */
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 1a74f0e488da..5e13efc62bad 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -734,7 +734,7 @@ int mtty_create(struct kobject *kobj, struct mdev_device *mdev)
for (i = 0; i < 2; i++) {
snprintf(name, MTTY_STRING_LEN, "%s-%d",
- dev_driver_string(mdev->parent->dev), i + 1);
+ dev_driver_string(mdev_parent_dev(mdev)), i + 1);
if (!strcmp(kobj->name, name)) {
nr_ports = i + 1;
break;