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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham 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 2FEC9C10F11 for ; Wed, 10 Apr 2019 21:53:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF46D20820 for ; Wed, 10 Apr 2019 21:53:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726678AbfDJVx2 (ORCPT ); Wed, 10 Apr 2019 17:53:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33820 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725782AbfDJVx2 (ORCPT ); Wed, 10 Apr 2019 17:53:28 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 467F558E4B; Wed, 10 Apr 2019 21:53:28 +0000 (UTC) Received: from t460p.redhat.com (ovpn-118-18.phx2.redhat.com [10.3.118.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id A404E5C3FD; Wed, 10 Apr 2019 21:53:27 +0000 (UTC) From: Scott Wood To: Alan Tull , Moritz Fischer Cc: linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org, Wu Hao , Scott Wood Subject: [PATCH] fpga: dfl: afu: Pass the correct device to dma_mapping_error() Date: Wed, 10 Apr 2019 16:53:27 -0500 Message-Id: <20190410215327.8024-1-swood@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 10 Apr 2019 21:53:28 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org dma_mapping_error() was being called on a different device struct than what was passed to map/unmap. Besides rendering the error checking ineffective, it caused a debug splat with CONFIG_DMA_API_DEBUG. Signed-off-by: Scott Wood --- drivers/fpga/dfl-afu-dma-region.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c index e18a786fc943..cd68002ac097 100644 --- a/drivers/fpga/dfl-afu-dma-region.c +++ b/drivers/fpga/dfl-afu-dma-region.c @@ -399,7 +399,7 @@ int afu_dma_map_region(struct dfl_feature_platform_data *pdata, region->pages[0], 0, region->length, DMA_BIDIRECTIONAL); - if (dma_mapping_error(&pdata->dev->dev, region->iova)) { + if (dma_mapping_error(dfl_fpga_pdata_to_parent(pdata), region->iova)) { dev_err(&pdata->dev->dev, "failed to map for dma\n"); ret = -EFAULT; goto unpin_pages; -- 1.8.3.1