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=-9.0 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,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 BD327C282CE for ; Mon, 11 Feb 2019 15:04:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D5E8222A7 for ; Mon, 11 Feb 2019 15:04:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549897483; bh=1cn7Itj5DcjuakRyZdngxYue+g1LIYwWb75HTmFksb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aEsY2chXstecSHSVSvW/NmWnkFiUV5xgMA8gWLwU6YBsGZ0VX+4C6IPoAT+ihucxP +y/QRE8W0bbjYpTB5C9Jxo2zlBobwIOeXyJ/0fZYWV5LuEErD9RdO+ChuLmneuAhCw XTWcmJ3PcBKW/RM8BPzGt/zk5N2p4Lu2nPpuwMVM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390846AbfBKPEm (ORCPT ); Mon, 11 Feb 2019 10:04:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:53690 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389808AbfBKPEi (ORCPT ); Mon, 11 Feb 2019 10:04:38 -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 63EEB222AD; Mon, 11 Feb 2019 15:04:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549897477; bh=1cn7Itj5DcjuakRyZdngxYue+g1LIYwWb75HTmFksb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RgVDK/15rMjA4q58Nz5nc9ZJ/IOjzxWsaxckE2D+mZp/eyb4zmQxwB8r3Yn4oP0t+ Dk22QTgcoRZQnQ33M5GDasp7JTKlRV/s67lcn61eNrrVKV+FdkWI+YPj/QQsoCighm P8v5xr5KmL4HTDVScWtAuyKaz1vowpoeB9nIfSR8= 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 4.9 002/137] staging: iio: adc: ad7280a: handle error from __ad7280_read32() Date: Mon, 11 Feb 2019 15:18:03 +0100 Message-Id: <20190211141812.166720711@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190211141811.964925535@linuxfoundation.org> References: <20190211141811.964925535@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 4.9-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 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