From: Thomas Hellström thomas.hellstrom@linux.intel.com
commit e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532 upstream.
On eviction errors other than -EMULTIHOP we were leaking a resource. Fix.
v2: - Avoid yet another goto (Andi Shyti)
Fixes: 403797925768 ("drm/ttm: Fix multihop assert on eviction.") Cc: Andrey Grodzovsky andrey.grodzovsky@amd.com Cc: Christian König christian.koenig@amd.com Cc: Christian Koenig christian.koenig@amd.com Cc: Huang Rui ray.huang@amd.com Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org # v5.15+ Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Reviewed-by: Nirmoy Das nirmoy.das@intel.com #v1 Reviewed-by: Andi Shyti andi.shyti@linux.intel.com Reviewed-by: Christian König christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20230626091450.14757-4-thomas.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/ttm/ttm_bo.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-)
--- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -458,18 +458,18 @@ static int ttm_bo_evict(struct ttm_buffe goto out; }
-bounce: - ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop); - if (ret == -EMULTIHOP) { + do { + ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop); + if (ret != -EMULTIHOP) + break; + ret = ttm_bo_bounce_temp_buffer(bo, &evict_mem, ctx, &hop); - if (ret) { - if (ret != -ERESTARTSYS && ret != -EINTR) - pr_err("Buffer eviction failed\n"); - ttm_resource_free(bo, &evict_mem); - goto out; - } - /* try and move to final place now. */ - goto bounce; + } while (!ret); + + if (ret) { + ttm_resource_free(bo, &evict_mem); + if (ret != -ERESTARTSYS && ret != -EINTR) + pr_err("Buffer eviction failed\n"); } out: return ret;