[PATCH] drm/i915/gvt: add the missing mdev attribute "name"

[Zhi Wang]

The mdev attribute "name" is required by some middle software, e.g.
KubeVirt, an open source SW that manages VM on Kubernetes cluster uses
the mdev sysfs directory/file structure to discover mediated device in
nodes in the cluster.

Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
Cc: Hui Chun Ong <hui.chun.ong at intel.com>
Cc: Terrence Xu <terrence.xu at intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
---
 drivers/gpu/drm/i915/gvt/kvmgt.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 20b82fb036f8..306b394848b0 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -186,9 +186,24 @@ static ssize_t description_show(struct mdev_type *mtype,
 		       type->weight);
 }
 
+static ssize_t name_show(struct mdev_type *mtype,
+			       struct mdev_type_attribute *attr, char *buf)
+{
+	struct intel_vgpu_type *type;
+	struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt;
+
+	type = &gvt->types[mtype_get_type_group_id(mtype)];
+	if (!type)
+		return 0;
+
+	return sprintf(buf, "%s\n", type->name);
+}
+
+
 static MDEV_TYPE_ATTR_RO(available_instances);
 static MDEV_TYPE_ATTR_RO(device_api);
 static MDEV_TYPE_ATTR_RO(description);
+static MDEV_TYPE_ATTR_RO(name);
 
 static struct attribute *gvt_type_attrs[] = {
 	&mdev_type_attr_available_instances.attr,
-- 
2.17.1