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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2205CC6FD1A for ; Tue, 7 Mar 2023 17:13:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229706AbjCGRNB (ORCPT ); Tue, 7 Mar 2023 12:13:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229651AbjCGRMe (ORCPT ); Tue, 7 Mar 2023 12:12:34 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88F1A97FF4 for ; Tue, 7 Mar 2023 09:07:34 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 696B661510 for ; Tue, 7 Mar 2023 17:07:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F66DC433D2; Tue, 7 Mar 2023 17:07:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678208829; bh=DsODWofmy00XIRRvc60X6STATM8F4j43gd7TwCmHCJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v600mSILCZ5mCdRyNm+J0i12YSUIxtz9Gahv+IuTlezc1PP8kE0l0RtfQNZitljnu 9GkjjrVaVhUbrIZeII4z+2hJM7uADZ78LPx88fx3j24vMFkHJTsOVxVEZp8Wv+Q6DW N/i4LMP6AMd8utcEnZLGLEzzaLse78hGPVFzwuAo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vasant Hegde , Joerg Roedel , "Limonciello, Mario" Subject: [PATCH 6.2 0004/1001] iommu/amd: Skip attach device domain is same as new domain Date: Tue, 7 Mar 2023 17:46:16 +0100 Message-Id: <20230307170022.303959181@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170022.094103862@linuxfoundation.org> References: <20230307170022.094103862@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vasant Hegde commit f451c7a5a3b818ecfeba2ba258570769998baf3a upstream. If device->domain is same as new domain then we can skip the device attach process. Signed-off-by: Vasant Hegde Link: https://lore.kernel.org/r/20230215052642.6016-2-vasant.hegde@amd.com Signed-off-by: Joerg Roedel Cc: "Limonciello, Mario" Signed-off-by: Greg Kroah-Hartman --- drivers/iommu/amd/iommu.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2161,6 +2161,13 @@ static int amd_iommu_attach_device(struc struct amd_iommu *iommu = rlookup_amd_iommu(dev); int ret; + /* + * Skip attach device to domain if new domain is same as + * devices current domain + */ + if (dev_data->domain == domain) + return 0; + dev_data->defer_attach = false; if (dev_data->domain)