4.4-stable review patch. If anyone has any objections, please let me know.
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From: Yong Zhao yong.zhao@amd.com
[ Upstream commit 5108d768408abc80e4e8d99f5b406a73cb04056b ]
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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -519,11 +519,17 @@ static ssize_t sysprops_show(struct kobj 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, };
@@ -559,6 +565,7 @@ static const struct sysfs_ops iolink_ops };
static struct kobj_type iolink_type = { + .release = kfd_topology_kobj_release, .sysfs_ops = &iolink_ops, };
@@ -586,6 +593,7 @@ static const struct sysfs_ops mem_ops = };
static struct kobj_type mem_type = { + .release = kfd_topology_kobj_release, .sysfs_ops = &mem_ops, };
@@ -625,6 +633,7 @@ static const struct sysfs_ops cache_ops };
static struct kobj_type cache_type = { + .release = kfd_topology_kobj_release, .sysfs_ops = &cache_ops, };
@@ -747,6 +756,7 @@ static const struct sysfs_ops node_ops = };
static struct kobj_type node_type = { + .release = kfd_topology_kobj_release, .sysfs_ops = &node_ops, };