[PATCH v2 4/6] mdev: Introduce an API mdev_alias

Parav Pandit
2019-08-29T11:19:41Z

Introduce an API mdev_alias() to provide access to optionally generated
alias.

Signed-off-by: Parav Pandit <parav@mellanox.com>
---
drivers/vfio/mdev/mdev_core.c | 12 ++++++++++++
include/linux/mdev.h | 1 +
2 files changed, 13 insertions(+)

diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index c9bf2ac362b9..5399ed6f1612 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -517,6 +517,18 @@ struct device *mdev_get_iommu_device(struct device *dev)
}
EXPORT_SYMBOL(mdev_get_iommu_device);

+/**
+ * mdev_alias: Return alias string of a mdev device
+ * @mdev: Pointer to the mdev device
+ * mdev_alias() returns alias string of a mdev device if alias is present,
+ * returns NULL otherwise.
+ */
+const char *mdev_alias(struct mdev_device *mdev)
+{
+ return mdev->alias;
+}
+EXPORT_SYMBOL(mdev_alias);
+
static int __init mdev_init(void)
{
int ret;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index f036fe9854ee..6da82213bc4e 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -148,5 +148,6 @@ void mdev_unregister_driver(struct mdev_driver *drv);
struct device *mdev_parent_dev(struct mdev_device *mdev);
struct device *mdev_dev(struct mdev_device *mdev);
struct mdev_device *mdev_from_dev(struct device *dev);
+const char *mdev_alias(struct mdev_device *mdev);

#endif /* MDEV_H */
--
2.19.2