[Nouveau] [PATCH 09/10] drm/nouveau/nvif: fix potential double-free

[Ben Skeggs]

From: Ben Skeggs <bskeggs at redhat.com>

DRM cleanup paths unconditionally call nvif_mmu_dtor() for clients,
which would result in a double-free if nvif_mmu_ctor()'d previously
failed.

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
---
 drivers/gpu/drm/nouveau/nvif/mmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nvif/mmu.c b/drivers/gpu/drm/nouveau/nvif/mmu.c
index 3709cbbc19a1..c9dd3cff49a0 100644
--- a/drivers/gpu/drm/nouveau/nvif/mmu.c
+++ b/drivers/gpu/drm/nouveau/nvif/mmu.c
@@ -27,6 +27,9 @@
 void
 nvif_mmu_dtor(struct nvif_mmu *mmu)
 {
+	if (!nvif_object_constructed(&mmu->object))
+		return;
+
 	kfree(mmu->kind);
 	kfree(mmu->type);
 	kfree(mmu->heap);
-- 
2.40.1