From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-by2nam01on0099.outbound.protection.outlook.com ([104.47.34.99]:20832 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726694AbeJAHOC (ORCPT ); Mon, 1 Oct 2018 03:14:02 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Ben Skeggs , Sasha Levin Subject: [PATCH AUTOSEL 4.18 31/65] drm/nouveau/mmu: don't attempt to dereference vmm without valid instance pointer Date: Mon, 1 Oct 2018 00:38:21 +0000 Message-ID: <20181001003754.146961-31-alexander.levin@microsoft.com> References: <20181001003754.146961-1-alexander.levin@microsoft.com> In-Reply-To: <20181001003754.146961-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Ben Skeggs [ Upstream commit 51ed833c881b9d96557c773f6a37018d79e29a46 ] Fixes oopses in certain failure paths. Signed-off-by: Ben Skeggs Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c b/drivers/gpu/dr= m/nouveau/nvkm/subdev/mmu/vmm.c index de269eb482dd..7459def78d50 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c @@ -1423,7 +1423,7 @@ nvkm_vmm_get(struct nvkm_vmm *vmm, u8 page, u64 size,= struct nvkm_vma **pvma) void nvkm_vmm_part(struct nvkm_vmm *vmm, struct nvkm_memory *inst) { - if (vmm->func->part && inst) { + if (inst && vmm->func->part) { mutex_lock(&vmm->mutex); vmm->func->part(vmm, inst); mutex_unlock(&vmm->mutex); --=20 2.17.1