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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 BC17FC43381 for ; Mon, 15 Mar 2021 14:28:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8DCCB65035 for ; Mon, 15 Mar 2021 14:28:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239228AbhCOO17 (ORCPT ); Mon, 15 Mar 2021 10:27:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:37820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233113AbhCOOAl (ORCPT ); Mon, 15 Mar 2021 10:00:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 89EEE64F21; Mon, 15 Mar 2021 14:00:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816809; bh=dDrwFa6owSn6R7R0/m6/hTi1cokMWlZNhTxRuZR9vR4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EqB1J8x9OPFPfyIKiXo9BWY2LbwSHIHGflJhwqaqVXIf2c2gmxuGbUUAhze/DgicC B+HYic+mPhYU6BOAfCB9CtgPEp2XMDiZh2HLTPR1AMlnsWyPEGd7Ji2AO2thjt6NJo 5H79qnIa2Vk7rSyfFwQb88ReolHOqDF5seWBjpHo= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ian Abbott Subject: [PATCH 4.14 78/95] staging: comedi: me4000: Fix endian problem for AI command data Date: Mon, 15 Mar 2021 14:57:48 +0100 Message-Id: <20210315135742.843011043@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135740.245494252@linuxfoundation.org> References: <20210315135740.245494252@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Kroah-Hartman From: Ian Abbott commit b39dfcced399d31e7c4b7341693b18e01c8f655e upstream. The analog input subdevice supports Comedi asynchronous commands that use Comedi's 16-bit sample format. However, the calls to `comedi_buf_write_samples()` are passing the address of a 32-bit integer variable. On bigendian machines, this will copy 2 bytes from the wrong end of the 32-bit value. Fix it by changing the type of the variable holding the sample value to `unsigned short`. Fixes: de88924f67d1 ("staging: comedi: me4000: use comedi_buf_write_samples()") Cc: # 3.19+ Signed-off-by: Ian Abbott Link: https://lore.kernel.org/r/20210223143055.257402-8-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/me4000.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -933,7 +933,7 @@ static irqreturn_t me4000_ai_isr(int irq struct comedi_subdevice *s = dev->read_subdev; int i; int c = 0; - unsigned int lval; + unsigned short lval; if (!dev->attached) return IRQ_NONE;