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,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 61008C282CD for ; Mon, 28 Jan 2019 16:50:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 320B12173C for ; Mon, 28 Jan 2019 16:50:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548694248; bh=Y1OaYGxvMY95y2V9hs5/Yy2B2Md+na4IRlsLIgKw8vw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YqeNNl6KVjXnH56e0ACQ8Yxa4UzL/sctI8jHc/JCnSqfYN2FVLe68BpgqlVC2An+/ OYrOdCqO4EEPWOLSLHs4glrhb6KL60MA3VPXPXFeY63KvkP387C9a+b4pOUPo3E1/4 9bv4GjegNStF/XFDpxaL1KPdVn1/ZV1658/TI6EM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388705AbfA1QT6 (ORCPT ); Mon, 28 Jan 2019 11:19:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:54976 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388690AbfA1QTy (ORCPT ); Mon, 28 Jan 2019 11:19:54 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 05D9320663; Mon, 28 Jan 2019 16:19:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692393; bh=Y1OaYGxvMY95y2V9hs5/Yy2B2Md+na4IRlsLIgKw8vw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zn/5LwqXfj8O6Xlu3aZEr7hkJpSWB2j5+KNBQrGSt59vF1L9ac6cVsm9OjsIbfpcp ArQzkcxA6WwbjC7iRLo8J8oFMjYWdX3RlHITiHW40Q/Z84hF+JS+CHg/BPO14EIlzb UBQPXwxqtuOe4zdZh+i57jw4T1/Z1IULzJFWUdVY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Slawomir Stepien , Jonathan Cameron , Sasha Levin , linux-iio@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH AUTOSEL 4.9 002/107] staging: iio: adc: ad7280a: handle error from __ad7280_read32() Date: Mon, 28 Jan 2019 11:18:02 -0500 Message-Id: <20190128161947.57405-2-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128161947.57405-1-sashal@kernel.org> References: <20190128161947.57405-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Slawomir Stepien [ 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 b460dda7eb65..dec25fadba8c 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 int 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 int 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 int 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