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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT 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 7A363C433F4 for ; Mon, 24 Sep 2018 09:02:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3E7C9208E3 for ; Mon, 24 Sep 2018 09:02:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E7C9208E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com 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 S1728368AbeIXPD2 (ORCPT ); Mon, 24 Sep 2018 11:03:28 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:42499 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727435AbeIXPD2 (ORCPT ); Mon, 24 Sep 2018 11:03:28 -0400 X-UUID: d2b413556fa848278a3317d34fbb5b13-20180924 Received: from mtkcas08.mediatek.inc [(172.21.101.126)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 458744986; Mon, 24 Sep 2018 17:02:20 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 24 Sep 2018 17:02:18 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 24 Sep 2018 17:02:18 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Robin Murphy , Rob Herring CC: Tomasz Figa , Will Deacon , Daniel Kurtz , , , , , , , , , , Subject: [PATCH v2 12/14] iommu/mediatek: Add shutdown callback Date: Mon, 24 Sep 2018 16:58:52 +0800 Message-ID: <1537779534-23575-13-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1537779534-23575-1-git-send-email-yong.wu@mediatek.com> References: <1537779534-23575-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the reboot burning test, if some Multimedia HW has something wrong, It may keep send the invalid request to IOMMU. In order to avoid affect the reboot flow, we add the shutdown callback to disable M4U HW when shutdown. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 18b130b..fb8aefc 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -710,6 +710,11 @@ static int mtk_iommu_remove(struct platform_device *pdev) return 0; } +static void mtk_iommu_shutdown(struct platform_device *pdev) +{ + mtk_iommu_remove(pdev); +} + static int __maybe_unused mtk_iommu_suspend(struct device *dev) { struct mtk_iommu_data *data = dev_get_drvdata(dev); @@ -785,6 +790,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) static struct platform_driver mtk_iommu_driver = { .probe = mtk_iommu_probe, .remove = mtk_iommu_remove, + .shutdown = mtk_iommu_shutdown, .driver = { .name = "mtk-iommu", .of_match_table = of_match_ptr(mtk_iommu_of_ids), -- 1.9.1