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 92E6CC4332F for ; Tue, 1 Mar 2022 10:53:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234398AbiCAKyS (ORCPT ); Tue, 1 Mar 2022 05:54:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232098AbiCAKyN (ORCPT ); Tue, 1 Mar 2022 05:54:13 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6513F27FDE; Tue, 1 Mar 2022 02:53:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=8kkkqKTmx4an5HwtAkctrRmIlb8tNewwdnwFgQaeBs4=; b=jLl0j4bSOfVgHsr3MQ5Bv5W25W eBCL+ezlRGLhWYJUDEMLnfnY03XvNmRuJ3NVkaIN+j91e7hLR85KeZAUrre7FDsYIGG5LJVefqfFQ aBw4XS4clVWlj8OlW5+no9SoBD1TeUv7rQYDWrKf4OHZIcAUPacEQWejKAQpzWZV4sMB16ogBdJNd BYo+cef7t0HrzSLXHOj4597NsWHTixNewjzb8+eB6sepbzbOCAKRdiYjQ0SKHJwpHXjDNI+7jB/Nl V6d7NCk96h2kf6oMslvOoIEJGHn3fDqOVyBakQxgHeZAYF5ayU7+PWsZkl0kSLTP/USHzDRJXcvab v9YgSnow==; Received: from [2.53.44.23] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nP08A-00GCxm-Dw; Tue, 01 Mar 2022 10:53:23 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: x86@kernel.org, Anshuman Khandual , Tom Lendacky , Konrad Rzeszutek Wilk , Stefano Stabellini , Boris Ostrovsky , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org Subject: [PATCH 02/12] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set Date: Tue, 1 Mar 2022 12:53:01 +0200 Message-Id: <20220301105311.885699-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220301105311.885699-1-hch@lst.de> References: <20220301105311.885699-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org If force bouncing is enabled we can't release the buffers. Signed-off-by: Christoph Hellwig Reviewed-by: Anshuman Khandual --- kernel/dma/swiotlb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index bfc56cb217059..64b390136f9ef 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -378,6 +378,9 @@ void __init swiotlb_exit(void) unsigned long tbl_vaddr; size_t tbl_size, slots_size; + if (swiotlb_force == SWIOTLB_FORCE) + return; + if (!mem->nslabs) return; -- 2.30.2