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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E3D0DC433EF for ; Mon, 4 Apr 2022 05:08:54 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KWzMT3pvyz3cDD for ; Mon, 4 Apr 2022 15:08:53 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=EB7gLsK0; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=bombadil.srs.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=batv+8f3f264ef3f87e17849e+6798+infradead.org+hch@bombadil.srs.infradead.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=EB7gLsK0; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KWzJn1Kbzz2xDl for ; Mon, 4 Apr 2022 15:06:33 +1000 (AEST) 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=3bKOwa/vIjXDTctiHR3yrY0M3Nyf9zVmyxkMzvumqG8=; b=EB7gLsK0UvHav6B4abhaPvjJm4 FSQhyO6o0EYvmijqssvR2Q1Gs9e9b7dbZYgZENsl7+jB7rWSFCNAlCbR1TzAA8Q1NVRTUwZMhXAYN +T/3Yc95IAf59JX6BzJyzdXMEVJ81KmzgtXkS84pkf42p/XCgBb24+Pe6oBHh6kTieMTt7Nj5y23Z wylVK+JE2wcAm+tlJTJmpJJ11tUpLjiTBDIjrztXtkuVK6/+I8gAYxYGF0MZhZA3St6JQ6dVe7QQT 4i4Fld7CnHSKQSuWGvKwAQtoK98Bi5BCZne67U1mZDxrdJZA+51OSEmE/tuOtZVdA7Qu782BgN/Y9 QNbBls1g==; Received: from 089144211060.atnat0020.highway.a1.net ([89.144.211.60] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbEuq-00D8ox-50; Mon, 04 Apr 2022 05:06:13 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Subject: [PATCH 02/15] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set Date: Mon, 4 Apr 2022 07:05:46 +0200 Message-Id: <20220404050559.132378-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220404050559.132378-1-hch@lst.de> References: <20220404050559.132378-1-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 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Tom Lendacky , linux-s390@vger.kernel.org, Stefano Stabellini , linux-ia64@vger.kernel.org, Anshuman Khandual , Konrad Rzeszutek Wilk , Robin Murphy , Joerg Roedel , x86@kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, tboot-devel@lists.sourceforge.net, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Boris Ostrovsky , David Woodhouse , linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Lu Baolu Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 73a41cec9e386..98bb0eb44a7bf 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -369,6 +369,9 @@ 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