From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8E05C43441 for ; Wed, 21 Nov 2018 09:33:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7A9D20989 for ; Wed, 21 Nov 2018 09:33:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="GWqr4FEU"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="Ddt341OD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A7A9D20989 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729539AbeKUUHc (ORCPT ); Wed, 21 Nov 2018 15:07:32 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:37874 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728810AbeKUUHc (ORCPT ); Wed, 21 Nov 2018 15:07:32 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 60ED460B12; Wed, 21 Nov 2018 09:33:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1542792827; bh=XUKaYDR/t6sKVg5zxPi9jY85x462ISIHa/Ib9RRhS6I=; h=Date:From:To:Subject:From; b=GWqr4FEUIOsL82iQUIa4cV9OrB5O3b2HbGa7zvvDbyyQJmro3gyYAE+C+dY3wnkDz NuIpkb1EfyV+JQS1f5ZnzMRwTmokWfmwvTe1vjea++AN4BcBbKMVRF0tG5Omv0xkee lbI1vH7A9PaRhxYWtQLf6csUvcF3Mb9P/FtF6TAo= Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id A42756047C; Wed, 21 Nov 2018 09:33:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1542792826; bh=XUKaYDR/t6sKVg5zxPi9jY85x462ISIHa/Ib9RRhS6I=; h=Date:From:To:Subject:From; b=Ddt341ODjJcljgc0YVDk5YJEGhgsqnn76uVliEz325vp4EjTchNNYT4QanchzV4AQ 7iRlB9kKw2rawLupn0BaK8M5LzQ9ehyCkqoA6GBoDVN0EG1plXkHitPcpwWkvT14Zv x5vWvHRJdPlFdJvGCl3kdWRmTTOpo3R50il5ySxc= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 21 Nov 2018 15:03:46 +0530 From: poza@codeaurora.org To: Dave Airlie , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: ASPEED graphics card: ast_pci_probe causes RCU stalls Message-ID: <146595c1e1c6753cca92cf70a7b79f47@codeaurora.org> X-Sender: poza@codeaurora.org User-Agent: Roundcube Webmail/1.2.5 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, we have on-board ASPEED Graphics card on PCIe. kernel version: 4.16 I select following drive to enable ast graphics support. Symbol: DRM_AST [=y] \u2502 AST server chips \u2502 Location: \u2502 -> Device Drivers \u2502 -> Graphics support \u2502 Defined at drivers/gpu/drm/ast/Kconfig:1 \u2502 Depends on: HAS_IOMEM [=y] && DRM [=y] && PCI [=y] && MMU [=y] \u2502 Selects: DRM_TTM [=y] && DRM_KMS_HELPER [=y] && DRM_TTM [=y] lspci -vvv output. ----------------------------- 0007:02:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 41) (prog-if 00 [VGA controller]) Subsystem: ASPEED Technology, Inc. ASPEED Graphics Family Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR-