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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 E3142C43381 for ; Mon, 18 Feb 2019 14:01:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B5927217D9 for ; Mon, 18 Feb 2019 14:01:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498473; bh=pzTspE0H7qZrL66Tp5ofdxeaNLTqcHUf1EsaiKUais8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=U9VbXLY1wJ98H+Syvm8DsEwqz/9bDC+T0WaH/xXBuFQ9gq9ih4GfufKKULtgH0qr0 cvQnvP1PVO+mxIWVPaJLrZsBIctICMAor/h2nTrYHNPnLQFlIOZ2V3G5Zwvbci79VM MNSJ5Ak535dfbYthZW4du0Z38OBRLkWJakhnU+IM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388495AbfBROBM (ORCPT ); Mon, 18 Feb 2019 09:01:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:42432 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388479AbfBROBD (ORCPT ); Mon, 18 Feb 2019 09:01:03 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 697E42070D; Mon, 18 Feb 2019 14:01:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498462; bh=pzTspE0H7qZrL66Tp5ofdxeaNLTqcHUf1EsaiKUais8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eS4Muu0E1tK7id7X5E+ph1NLWof9meziDMIBS0KWI2f9WBZsPOpVHfJn7HfqThaDp 08j6wxlpF1i7bgX5J87yQ7ug81CssqIeB1XRkH/lXtD3bT/Gz9zTXDQlFjweaNDuZ4 aeCMlGJ94lrF2PysBE2DtyCTGFC64hZoJI4VrOGY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Slawomir Stepien , Jonathan Cameron , Sasha Levin Subject: [PATCH 4.4 002/143] staging: iio: adc: ad7280a: handle error from __ad7280_read32() Date: Mon, 18 Feb 2019 14:42:10 +0100 Message-Id: <20190218133529.202275702@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190218133529.099444112@linuxfoundation.org> References: <20190218133529.099444112@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 0559ef7fde67bc6c83c6eb6329dbd6649528263e ] Inside __ad7280_read32(), the spi_sync_transfer() can fail with negative error code. This change will ensure that this error is being passed up in the call stack, so it can be handled. Signed-off-by: Slawomir Stepien Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/staging/iio/adc/ad7280a.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c index 35acb1a4669b..db8390022732 100644 --- a/drivers/staging/iio/adc/ad7280a.c +++ b/drivers/staging/iio/adc/ad7280a.c @@ -250,7 +250,9 @@ static int ad7280_read(struct ad7280_state *st, unsigned devaddr, if (ret) return ret; - __ad7280_read32(st, &tmp); + ret = __ad7280_read32(st, &tmp); + if (ret) + return ret; if (ad7280_check_crc(st, tmp)) return -EIO; @@ -288,7 +290,9 @@ static int ad7280_read_channel(struct ad7280_state *st, unsigned devaddr, ad7280_delay(st); - __ad7280_read32(st, &tmp); + ret = __ad7280_read32(st, &tmp); + if (ret) + return ret; if (ad7280_check_crc(st, tmp)) return -EIO; @@ -321,7 +325,9 @@ static int ad7280_read_all_channels(struct ad7280_state *st, unsigned cnt, ad7280_delay(st); for (i = 0; i < cnt; i++) { - __ad7280_read32(st, &tmp); + ret = __ad7280_read32(st, &tmp); + if (ret) + return ret; if (ad7280_check_crc(st, tmp)) return -EIO; @@ -364,7 +370,10 @@ static int ad7280_chain_setup(struct ad7280_state *st) return ret; for (n = 0; n <= AD7280A_MAX_CHAIN; n++) { - __ad7280_read32(st, &val); + ret = __ad7280_read32(st, &val); + if (ret) + return ret; + if (val == 0) return n - 1; -- 2.19.1