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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 CBBEFC433E0 for ; Wed, 24 Feb 2021 13:05:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7468664E6C for ; Wed, 24 Feb 2021 13:05:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235607AbhBXNDb (ORCPT ); Wed, 24 Feb 2021 08:03:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:50132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235221AbhBXMwp (ORCPT ); Wed, 24 Feb 2021 07:52:45 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2012764F22; Wed, 24 Feb 2021 12:51:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614171076; bh=asoP4vmNUIKzTu/WQvAJHOSjOZC5arPbeF1w0w2Iw3M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LXehoa2M8EG1QDmCfTcMBeZ6I4aUvWYcoBgXf599cDzlVqcdxWSjS/cfNerwyU4J5 ItnTEKdYxcNS+fbVpOBNU33KsIP4GYp13daXpUxXBRWtXfazb4MdfbAF6G/CfUqu2P hp3e2SBrB2E5dRLqRGFXplpr8FLHGJRu5d38GkNvGG/g9VBnoyj3O94lTx1xbucunZ Cncha98H1Y2e4YhEqgZWO96UV2ENNdgnG3BIaFiu4JxJzDiihMUntXKRwn0798emtt KCGlU8GywQG23g1HUsyYfjeayb4FMLYg+rkKO7f8GWWf8B+qCWZW+SLQA/W2b3S5an +T0pnkEucHR3Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jingwen Chen , Monk Liu , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.11 36/67] drm/amd/amdgpu: add error handling to amdgpu_virt_read_pf2vf_data Date: Wed, 24 Feb 2021 07:49:54 -0500 Message-Id: <20210224125026.481804-36-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210224125026.481804-1-sashal@kernel.org> References: <20210224125026.481804-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jingwen Chen [ Upstream commit 64dcf2f01d59cf9fad19b1a387bd39736a8f4d69 ] [Why] when vram lost happened in guest, try to write vram can lead to kernel stuck. [How] When the readback data is invalid, don't do write work, directly reschedule a new work. Signed-off-by: Jingwen Chen Reviewed-by: Monk Liu Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 2d51b7694d1fd..572153d08ad11 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -560,10 +560,14 @@ static int amdgpu_virt_write_vf2pf_data(struct amdgpu_device *adev) static void amdgpu_virt_update_vf2pf_work_item(struct work_struct *work) { struct amdgpu_device *adev = container_of(work, struct amdgpu_device, virt.vf2pf_work.work); + int ret; - amdgpu_virt_read_pf2vf_data(adev); + ret = amdgpu_virt_read_pf2vf_data(adev); + if (ret) + goto out; amdgpu_virt_write_vf2pf_data(adev); +out: schedule_delayed_work(&(adev->virt.vf2pf_work), adev->virt.vf2pf_update_interval_ms); } -- 2.27.0