From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2005596-1520009717-2-17842815507363728825 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.249, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='us-ascii' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520009717; b=DjocbEjCUZeracGFz8a9mRIP9SRt4FEkwq4HuLLhkjpoYAu TTHAX9xnUl0NuXXfJPypReIr76Z1IvNF/Ythe5a1itYgngckmm4v8/6QcR9F1sOj hR+rf1k4Fs5WZvxt5r5J/r/tQrEny++JzO9zM9F5pBG8uwIBfHUVROW0pDJRtixo NBjSdd+13w/HLV/Awh0W3Cxvu6b+snIICfODlkGH0UNKz2NJPmM2JAoEyaV1D9Pr WUPJX1d9dNljy2RVy5c+6CNemsIZRPjm182KL5Y1/9hj5148vGWGQfXCGCA+KFEY EkQCQ18H57rbYSCK821aizA3S3FrA5P9VOtx/iA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to:sender :list-id; s=arctest; t=1520009717; bh=gUZr65ehp8+3IMVerHT2wV1+jk /IsYhsbj3LM5QE56M=; b=OsKS+yeNBmz1qbGTKrxjoyYzMImBd0HvpzjU17druZ wXyz/vSPv85yJJWF73Zx7Y3Vi9xhRiiEit9SlMsXmTV11WyuWtn6uubziXqHjjdT +dFCltrSlntr9yFmqo3s3Ua06ZNTKR/U8yWFffRC08wJP9hT1WpNRqy4KjTzDOgV HUgg+u1TG7EXTm3N/TRplQCwjd+XEmohqECH5nzqkeTr/+UonExdguzCl/QGP7Fu ilxUv/Ly8T7o2WJZqcMaHBPPEeW+dbBzm1kbzX2nbv1gKbrbcKd4ILLcASLRyGbR v/eNoOHKkVZCrxTfh+m9Rr+Z4ZvPgNstSqhmenuv2kNA== ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1425736AbeCBQzA (ORCPT ); Fri, 2 Mar 2018 11:55:00 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:50086 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423840AbeCBQy6 (ORCPT ); Fri, 2 Mar 2018 11:54:58 -0500 Date: Fri, 2 Mar 2018 17:54:58 +0100 From: Greg KH To: Maxime Chevallier Cc: Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Thomas Petazzoni Subject: Re: [PATCH] spi: Fix scatterlist elements size in spi_map_buf Message-ID: <20180302165458.GC8704@kroah.com> References: <20180302145509.24563-1-maxime.chevallier@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180302145509.24563-1-maxime.chevallier@bootlin.com> User-Agent: Mutt/1.9.3 (2018-01-21) Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Fri, Mar 02, 2018 at 03:55:09PM +0100, Maxime Chevallier wrote: > When SPI transfers can be offloaded using DMA, the SPI core need to > build a scatterlist to make sure that the buffer to be transferred is > dma-able. > > This patch fixes the scatterlist entry size computation in the case > where the maximum acceptable scatterlist entry supported by the DMA > controller is less than PAGE_SIZE, when the buffer is vmalloced. > > For each entry, the actual size is given by the minimum between the > desc_len (which is the max buffer size supported by the DMA controller) > and the remaining buffer length until we cross a page boundary. > > Fixes: 65598c13fd66 ("spi: Fix per-page mapping of unaligned vmalloc-ed buffer") > Signed-off-by: Maxime Chevallier > --- > drivers/spi/spi.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.