From 30b6d754525da76550a36fb788aba8fd31e49526 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michel=20D=C3=A4nzer?= Date: Mon, 25 Jun 2018 11:07:17 +0200 Subject: [PATCH 4716/5725] drm/amdgpu: Reserve VM root shared fence slot for command submission (v3) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Without this, there could not be enough slots, which could trigger the BUG_ON in reservation_object_add_shared_fence. v2: * Jump to the error label instead of returning directly (Jerry Zhang) v3: * Reserve slots for command submission after VM updates (Christian König) Cc: stable@vger.kernel.org Bugzilla: https://bugs.freedesktop.org/106418 Reported-by: mikhail.v.gavrilov@gmail.com Signed-off-by: Michel Dänzer Signed-off-by: Junwei Zhang Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index abe2bff..da11c95 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -930,6 +930,10 @@ static int amdgpu_cs_ib_vm_chunk(struct amdgpu_device *adev, r = amdgpu_bo_vm_update_pte(p); if (r) return r; + + r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv); + if (r) + return r; } return amdgpu_cs_sync_rings(p); -- 2.7.4