Message ID | 20171229081911.2802-22-hch@lst.de |
---|---|
State | Not Applicable |
Delegated to: | David Miller |
Headers | show
Return-Path: <sparclinux-owner@vger.kernel.org> X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=<UNKNOWN>) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="d7qtnqlh"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3z7KgS2dGFz9s74 for <patchwork-incoming@ozlabs.org>; Fri, 29 Dec 2017 19:36:20 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755945AbdL2IgS (ORCPT <rfc822;patchwork-incoming@ozlabs.org>); Fri, 29 Dec 2017 03:36:18 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:49241 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932348AbdL2IU6 (ORCPT <rfc822; sparclinux@vger.kernel.org>); Fri, 29 Dec 2017 03:20:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=eg3FoMyX47+08LQfB+VADoF49XFCp9/mxmidhro7i7k=; b=d7qtnqlhDxSs/fjn4TyeuLNbB JZKYBXfjjhVEMqln+n4jo8XnWltIbS8+q/R3R9oKx+fo0VG/A1GrT6wMh5JRQSBLEy3q3xjwc4GBs CPBI1QFxVlTomTOW37gi0ShCOFh+5Gf+Rav93VIAyWL8Jszzbkjr5OToT67QwfhTKtYwgG1gMnI4H kwrh4+TD1blW+IjqabKMdRgE/Wxf7a3vWRad5hiZMnQrEWGovBVnUQY6ttvHpjGwh3P83kgG/RD8N HFX62BzWk+pLLtbkacZAGwsB75DB2iZ5Rup6e/s+mMYXS6CCtZDYByrwlcnO7nMgNeLd6XjN7R0G3 bvb4pEXww==; Received: from 77.117.237.29.wireless.dyn.drei.com ([77.117.237.29] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1eUpuM-0001M5-I6; Fri, 29 Dec 2017 08:20:51 +0000 From: Christoph Hellwig <hch@lst.de> To: iommu@lists.linux-foundation.org Cc: linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, adi-buildroot-devel@lists.sourceforge.net, linux-c6x-dev@linux-c6x.org, linux-cris-kernel@axis.com, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-metag@vger.kernel.org, Michal Simek <monstr@monstr.eu>, linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, patches@groups.riscv.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Guan Xuetao <gxt@mprc.pku.edu.cn>, x86@kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 21/67] dma-mapping: warn when there is no coherent_dma_mask Date: Fri, 29 Dec 2017 09:18:25 +0100 Message-Id: <20171229081911.2802-22-hch@lst.de> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171229081911.2802-1-hch@lst.de> References: <20171229081911.2802-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: <sparclinux.vger.kernel.org> X-Mailing-List: sparclinux@vger.kernel.org |
Series |
[01/67] x86: remove X86_PPRO_FENCE
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expand
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diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index e77e2dec4723..2779d544485c 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -520,6 +520,7 @@ static inline void *dma_alloc_attrs(struct device *dev, size_t size, void *cpu_addr; BUG_ON(!ops); + WARN_ON_ONCE(!dev->coherent_dma_mask); if (dma_alloc_from_dev_coherent(dev, size, dma_handle, &cpu_addr)) return cpu_addr;
These days all devices should have a DMA coherent mask, and most dma_ops implementations rely on that fact. But just to be sure add an assert to ring the warning bell if that is not the case. Signed-off-by: Christoph Hellwig <hch@lst.de> --- include/linux/dma-mapping.h | 1 + 1 file changed, 1 insertion(+)