[PATCH 4/4] drm/ttm: Don't leak a resource on swapout move error

[Thomas Hellström]

If moving the bo to system for swapout failed, we were leaking
a resource. Fix.

Fixes: bfa3357ef9ab ("drm/ttm: allocate resource object instead of embedding it 
v2")
Cc: Christian König <christian.koe...@amd.com>
Cc: "Christian König" <ckoenig.leichtzumer...@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <sta...@vger.kernel.org> # v5.14+
Signed-off-by: Thomas Hellström <thomas.hellst...@linux.intel.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 89530f2a027f..d737ddd7f4c0 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1166,6 +1166,7 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct 
ttm_operation_ctx *ctx,
                ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop);
                if (unlikely(ret != 0)) {
                        WARN(ret == -EMULTIHOP, "Unexpected multihop in swaput 
- likely driver bug.\n");
+                       ttm_resource_free(bo, &evict_mem);
                        goto out;
                }
        }
-- 
2.40.1