drm/amdkfd: Fix memory leaks in kfd topology

Kobject created using kobject_create_and_add() can be freed using
kobject_put() when there is no referenece any more. However,
kobject memory allocated with kzalloc() has to set up a release
callback in order to free it when the counter decreases to 0.
Otherwise it causes memory leak.

Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index b614746c2523..9b9824f97de5 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -501,11 +501,17 @@ static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
         return ret;
 }
 
+static void kfd_topology_kobj_release(struct kobject *kobj)
+{
+        kfree(kobj);
+}
+
 static const struct sysfs_ops sysprops_ops = {
         .show = sysprops_show,
 };
 
 static struct kobj_type sysprops_type = {
+        .release = kfd_topology_kobj_release,
         .sysfs_ops = &sysprops_ops,
 };
 
@@ -541,6 +547,7 @@ static const struct sysfs_ops iolink_ops = {
 };
 
 static struct kobj_type iolink_type = {
+        .release = kfd_topology_kobj_release,
         .sysfs_ops = &iolink_ops,
 };
 
@@ -568,6 +575,7 @@ static const struct sysfs_ops mem_ops = {
 };
 
 static struct kobj_type mem_type = {
+        .release = kfd_topology_kobj_release,
         .sysfs_ops = &mem_ops,
 };
 
@@ -607,6 +615,7 @@ static const struct sysfs_ops cache_ops = {
 };
 
 static struct kobj_type cache_type = {
+        .release = kfd_topology_kobj_release,
         .sysfs_ops = &cache_ops,
 };
 
@@ -729,6 +738,7 @@ static const struct sysfs_ops node_ops = {
 };
 
 static struct kobj_type node_type = {
+        .release = kfd_topology_kobj_release,
         .sysfs_ops = &node_ops,
 };