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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 1CC47C43460 for ; Tue, 18 May 2021 12:55:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF26261209 for ; Tue, 18 May 2021 12:55:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230090AbhERM47 (ORCPT ); Tue, 18 May 2021 08:56:59 -0400 Received: from h2.fbrelay.privateemail.com ([131.153.2.43]:60773 "EHLO h2.fbrelay.privateemail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349416AbhERM4t (ORCPT ); Tue, 18 May 2021 08:56:49 -0400 Received: from MTA-06-3.privateemail.com (mta-06.privateemail.com [68.65.122.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by h1.fbrelay.privateemail.com (Postfix) with ESMTPS id A97B5800BD for ; Tue, 18 May 2021 08:55:30 -0400 (EDT) Received: from MTA-06.privateemail.com (localhost [127.0.0.1]) by MTA-06.privateemail.com (Postfix) with ESMTP id 354876005B; Tue, 18 May 2021 08:55:29 -0400 (EDT) Received: from hal-station.. (unknown [10.20.151.225]) by MTA-06.privateemail.com (Postfix) with ESMTPA id 6B7516005F; Tue, 18 May 2021 08:55:28 -0400 (EDT) From: Hamza Mahfooz To: linux-kernel@vger.kernel.org Cc: Christoph Hellwig , Marek Szyprowski , Robin Murphy , iommu@lists.linux-foundation.org, Hamza Mahfooz , Dan Williams Subject: [PATCH] dma debug: report -EEXIST errors in add_dma_entry Date: Tue, 18 May 2021 08:54:43 -0400 Message-Id: <20210518125443.34148-1-someguy@effective-light.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since, overlapping mappings are not supported by the DMA API we should report an error if active_cacheline_insert returns -EEXIST. Suggested-by: Dan Williams Signed-off-by: Hamza Mahfooz --- kernel/dma/debug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 14de1271463f..dadae6255d05 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -566,11 +566,9 @@ static void add_dma_entry(struct dma_debug_entry *entry) if (rc == -ENOMEM) { pr_err("cacheline tracking ENOMEM, dma-debug disabled\n"); global_disable = true; + } else if (rc == -EEXIST) { + pr_err("cacheline tracking EEXIST, overlapping mappings aren't supported\n"); } - - /* TODO: report -EEXIST errors here as overlapping mappings are - * not supported by the DMA API - */ } static int dma_debug_create_entries(gfp_t gfp) -- 2.31.1