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=-20.2 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 C3AD3C6379B for ; Mon, 19 Jul 2021 16:17:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B035861431 for ; Mon, 19 Jul 2021 16:17:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349601AbhGSPgB (ORCPT ); Mon, 19 Jul 2021 11:36:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:53314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237756AbhGSO57 (ORCPT ); Mon, 19 Jul 2021 10:57:59 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7A6A36120C; Mon, 19 Jul 2021 15:35:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626708935; bh=KIctiX+qkkb2JGot/CjdDUu0zcaztywjIL1hxxdO7nQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Yc0P3jZdoWE/e8moGMIzqH0hHRRZ3c5A05rs0+JdEZleuOyXfv+lFNSB9mAIZpfSB gHzcdcgk+ZGQKFLd72YkJtIz+K8uWKPo0dbrX7gEk3X2f6jsWZkavH5eZj+0NvbrWz bJve63onUtgsP7/YtBj1r13tT9A6NuHSeyUHrOHI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Andy Shevchenko , Sasha Levin Subject: [PATCH 4.19 181/421] iio: light: isl29125: Fix buffer alignment in iio_push_to_buffers_with_timestamp() Date: Mon, 19 Jul 2021 16:49:52 +0200 Message-Id: <20210719144952.706487225@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144946.310399455@linuxfoundation.org> References: <20210719144946.310399455@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: Jonathan Cameron [ Upstream commit 3d4725194de6935dba2ad7c9cc075c885008f747 ] To make code more readable, use a structure to express the channel layout and ensure the timestamp is 8 byte aligned. Found during an audit of all calls of uses of iio_push_to_buffers_with_timestamp() Fixes: 6c25539cbc46 ("iio: Add Intersil isl29125 digital color light sensor driver") Signed-off-by: Jonathan Cameron Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210501170121.512209-18-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/light/isl29125.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/iio/light/isl29125.c b/drivers/iio/light/isl29125.c index ed38edcd5efe..d0f5fd42c0ec 100644 --- a/drivers/iio/light/isl29125.c +++ b/drivers/iio/light/isl29125.c @@ -54,7 +54,11 @@ struct isl29125_data { struct i2c_client *client; u8 conf1; - u16 buffer[8]; /* 3x 16-bit, padding, 8 bytes timestamp */ + /* Ensure timestamp is naturally aligned */ + struct { + u16 chans[3]; + s64 timestamp __aligned(8); + } scan; }; #define ISL29125_CHANNEL(_color, _si) { \ @@ -187,10 +191,10 @@ static irqreturn_t isl29125_trigger_handler(int irq, void *p) if (ret < 0) goto done; - data->buffer[j++] = ret; + data->scan.chans[j++] = ret; } - iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, iio_get_time_ns(indio_dev)); done: -- 2.30.2