From patchwork Tue Jun 9 17:44:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224614 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 72F5EC433E0 for ; Tue, 9 Jun 2020 18:20:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 422452068D for ; Tue, 9 Jun 2020 18:20:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591726852; bh=I8e9rXkiQJBJOMniruow/r9QenuLuPUf8wI/t2e2w7I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JEApfkiQg9U7cnp3Qovyt4XLHJaD8IxHmXs9HIis5wkXJDbt/kcAwudHG4B0jC73L wg8erpmcBJ4WhoePqt59Qh3zFpF8zCjuPFLnXG0ly5NPU5hTNCZ7zQ/X7xYut9fweB TSjUlkPWtpWTSrO66P6796wg3ICBJWNRY3kLmpPY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388921AbgFISUn (ORCPT ); Tue, 9 Jun 2020 14:20:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:33674 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732334AbgFIRsu (ORCPT ); Tue, 9 Jun 2020 13:48:50 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5FB9620801; Tue, 9 Jun 2020 17:48:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591724929; bh=I8e9rXkiQJBJOMniruow/r9QenuLuPUf8wI/t2e2w7I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wZ4h7GifXSawG66L9AoAWj3i4CTM/hfAmNNFNlo7OEE7IpxrFyKusuEyyCSyBU4AF Z9CGz7mX2gIy1xmtMockt4iXgR+LAw1JP6DgLIE9JJmckYiyRgLzPRhOtRjaq7SNpM 8tz/a8syih/fJwodoAUs6MhOK/t7i/TCK5v+hYxo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mathieu Othacehe , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 4.9 41/42] iio: vcnl4000: Fix i2c swapped word reading. Date: Tue, 9 Jun 2020 19:44:47 +0200 Message-Id: <20200609174020.075090473@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200609174015.379493548@linuxfoundation.org> References: <20200609174015.379493548@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mathieu Othacehe [ Upstream commit 18dfb5326370991c81a6d1ed6d1aeee055cb8c05 ] The bytes returned by the i2c reading need to be swapped unconditionally. Otherwise, on be16 platforms, an incorrect value will be returned. Taking the slow path via next merge window as its been around a while and we have a patch set dependent on this which would be held up. Fixes: 62a1efb9f868 ("iio: add vcnl4000 combined ALS and proximity sensor") Signed-off-by: Mathieu Othacehe Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/light/vcnl4000.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index 360b6e98137a..5a3a532937ba 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -61,7 +61,6 @@ static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask, u8 rdy_mask, u8 data_reg, int *val) { int tries = 20; - __be16 buf; int ret; mutex_lock(&data->lock); @@ -88,13 +87,12 @@ static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask, goto fail; } - ret = i2c_smbus_read_i2c_block_data(data->client, - data_reg, sizeof(buf), (u8 *) &buf); + ret = i2c_smbus_read_word_swapped(data->client, data_reg); if (ret < 0) goto fail; mutex_unlock(&data->lock); - *val = be16_to_cpu(buf); + *val = ret; return 0;