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=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 99241C43387 for ; Fri, 18 Jan 2019 11:46:19 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C7EE820823 for ; Fri, 18 Jan 2019 11:46:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="WDPzRC2c" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C7EE820823 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 43gzfw6TTqzDr0s for ; Fri, 18 Jan 2019 22:46:16 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=bombadil.srs.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=batv+606761215ffed07ca90d+5626+infradead.org+hch@bombadil.srs.infradead.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="WDPzRC2c"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 43gzT66JQDzDqtK for ; Fri, 18 Jan 2019 22:37:46 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; 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: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=2aYhig1QlsGQZwSKaFkXby/qGv5OFiUqnUWT7ckjNi4=; b=WDPzRC2c1XDGytb70JraRr5OsV DpAzvWFxenhXg9gpim14Cg32iOOHOrOqZXEtHtxbZhXtduiIiHT/lGTQicR5Q5WUuryH7OPs9QHfd FgdQKkHdhsoU9jywFlznVm+9wtwSE1Xvge7Wyt1hCJwWg+w8g6J4kzsFJ7y2cldlBd4ebWYHgpWJ9 PG4hWEW28A/JO/td5s9H+NcPWLwIKNihqoXdLSSXr4ZEII73gfyiF5Cmye+pHGI8e+7knNsuoatN8 c8Lwq0kgbpvR6gW+LaRd92slOKp3AXlLrUgSo9BhdfW7h2pDpibNU9aR46f7oM7cRUgV9RliOEBaR zU09Ir1g==; Received: from 089144210168.atnat0019.highway.a1.net ([89.144.210.168] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gkSSu-0005Oo-BK; Fri, 18 Jan 2019 11:37:36 +0000 From: Christoph Hellwig To: Pawel Osciak , Marek Szyprowski , Kyungmin Park , =?UTF-8?q?Niklas=20S=C3=B6derlund?= Subject: [PATCH 2/3] dma-mapping: don't BUG when calling dma_map_resource on RAM Date: Fri, 18 Jan 2019 12:37:26 +0100 Message-Id: <20190118113727.3270-3-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190118113727.3270-1-hch@lst.de> References: <20190118113727.3270-1-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: Robin Murphy , Russell King , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Mauro Carvalho Chehab , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Use WARN_ON_ONCE to print a stack trace and return a proper error code instead. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- include/linux/dma-mapping.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 9842085e6774..b904d55247ab 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -353,7 +353,8 @@ static inline dma_addr_t dma_map_resource(struct device *dev, BUG_ON(!valid_dma_direction(dir)); /* Don't allow RAM to be mapped */ - BUG_ON(pfn_valid(PHYS_PFN(phys_addr))); + if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) + return DMA_MAPPING_ERROR; if (dma_is_direct(ops)) addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs); -- 2.20.1