From patchwork Mon Apr 25 17:57:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 8931181 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 64114BF29F for ; Mon, 25 Apr 2016 17:57:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 73BF8201F2 for ; Mon, 25 Apr 2016 17:57:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A08A201EC for ; Mon, 25 Apr 2016 17:57:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933344AbcDYR5M (ORCPT ); Mon, 25 Apr 2016 13:57:12 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:41996 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933337AbcDYR5J (ORCPT ); Mon, 25 Apr 2016 13:57:09 -0400 Received: from debutante.sirena.org.uk ([2a01:348:6:8808:fab::3] helo=debutante) by mezzanine.sirena.org.uk with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1aukkr-00053r-5E; Mon, 25 Apr 2016 17:57:06 +0000 Received: from broonie by debutante with local (Exim 4.87) (envelope-from ) id 1aukko-0007o3-5w; Mon, 25 Apr 2016 18:57:02 +0100 From: Mark Brown To: Vignesh R Cc: Mark Brown , Mark Brown , linux-spi@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <1461577442-8853-2-git-send-email-vigneshr@ti.com> Message-Id: Date: Mon, 25 Apr 2016 18:57:02 +0100 X-SA-Exim-Connect-IP: 2a01:348:6:8808:fab::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: Applied "spi: return error if kmap'd buffers passed to spi_map_buf()" to the spi tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch spi: return error if kmap'd buffers passed to spi_map_buf() has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark From 0569a88f3d1ffed94b15569d53872f16e2351099 Mon Sep 17 00:00:00 2001 From: Vignesh R Date: Mon, 25 Apr 2016 15:14:00 +0530 Subject: [PATCH] spi: return error if kmap'd buffers passed to spi_map_buf() Current spi_map_buf() implementation supports creates sg_table for vmalloc'd and kmalloc'd buffers. Therefore return error if kmap'd buffer (or any other buffer) is passed to spi_map_buf(). Signed-off-by: Vignesh R Signed-off-by: Mark Brown --- drivers/spi/spi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 6c4c050e6b65..a50f880a5036 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -717,9 +717,11 @@ static int spi_map_buf(struct spi_master *master, struct device *dev, if (vmalloced_buf) { desc_len = min_t(int, max_seg_size, PAGE_SIZE); sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len); - } else { + } else if (virt_addr_valid(buf)) { desc_len = min_t(int, max_seg_size, master->max_dma_len); sgs = DIV_ROUND_UP(len, desc_len); + } else { + return -EINVAL; } ret = sg_alloc_table(sgt, sgs, GFP_KERNEL);