From nobody Wed Sep 3 06:03:21 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94919ECAAA1 for ; Mon, 24 Oct 2022 12:25:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233626AbiJXMZy (ORCPT ); Mon, 24 Oct 2022 08:25:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233786AbiJXMYS (ORCPT ); Mon, 24 Oct 2022 08:24:18 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A2F85FA8; Mon, 24 Oct 2022 05:00:24 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 1A048B811E6; Mon, 24 Oct 2022 11:56:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6B084C433B5; Mon, 24 Oct 2022 11:56:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666612571; bh=MPx8MYZaOpRhJircYdIbMtxUIK98qNQOL2IsJCYo8Pk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sz6U8loaYMgwSKHqpZ71LGpQcWIP+nMdiOXq1Oh7amVNN/XtX8Smpx3c/dXlB/TIk 8MfxGBMxfnm241msD4iiE9w54yPoG6UNCZ8ptDjDS6DZwP6BO8HlmynWa1NzHUJVpo EoPLInAtPDH1Ki4yxmR+YD62Eh0iJu8MOsciyb60= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tudor Ambarus , Alexander Dahl , Peter Rosin , Boris Brezillon , Miquel Raynal Subject: [PATCH 4.19 037/229] mtd: rawnand: atmel: Unmap streaming DMA mappings Date: Mon, 24 Oct 2022 13:29:16 +0200 Message-Id: <20221024113000.304537542@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024112959.085534368@linuxfoundation.org> References: <20221024112959.085534368@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tudor Ambarus commit 1161703c9bd664da5e3b2eb1a3bb40c210e026ea upstream. Every dma_map_single() call should have its dma_unmap_single() counterpart, because the DMA address space is a shared resource and one could render the machine unusable by consuming all DMA addresses. Link: https://lore.kernel.org/lkml/13c6c9a2-6db5-c3bf-349b-4c127ad3496a@axe= ntia.se/ Cc: stable@vger.kernel.org Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver") Signed-off-by: Tudor Ambarus Acked-by: Alexander Dahl Reported-by: Peter Rosin Tested-by: Alexander Dahl Reviewed-by: Boris Brezillon Tested-by: Peter Rosin Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20220728074014.145406-1-tudor.ambar= us@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/nand/raw/atmel/nand-controller.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/mtd/nand/raw/atmel/nand-controller.c +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c @@ -398,6 +398,7 @@ static int atmel_nand_dma_transfer(struc =20 dma_async_issue_pending(nc->dmac); wait_for_completion(&finished); + dma_unmap_single(nc->dev, buf_dma, len, dir); =20 return 0;