From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752819AbdLLMq7 (ORCPT ); Tue, 12 Dec 2017 07:46:59 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:58924 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752415AbdLLMqz (ORCPT ); Tue, 12 Dec 2017 07:46:55 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pan Bian , Sebastian Reichel , Tony Lindgren , Jonathan Cameron Subject: [PATCH 4.14 023/164] iio: adc: cpcap: fix incorrect validation Date: Tue, 12 Dec 2017 13:43:23 +0100 Message-Id: <20171212123444.990411083@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171212123443.785979602@linuxfoundation.org> References: <20171212123443.785979602@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pan Bian commit 81b039ec36a41a5451e1e36f05bb055eceab1dc8 upstream. Function platform_get_irq_byname() returns a negative error code on failure, and a zero or positive number on success. However, in function cpcap_adc_probe(), positive IRQ numbers are also taken as error cases. Use "if (ddata->irq < 0)" instead of "if (!ddata->irq)" to validate the return value of platform_get_irq_byname(). Signed-off-by: Pan Bian Fixes: 25ec249632d50 ("iio: adc: cpcap: Add minimal support for CPCAP PMIC ADC") Reviewed-by: Sebastian Reichel Acked-by: Tony Lindgren Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/adc/cpcap-adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/adc/cpcap-adc.c +++ b/drivers/iio/adc/cpcap-adc.c @@ -1012,7 +1012,7 @@ static int cpcap_adc_probe(struct platfo platform_set_drvdata(pdev, indio_dev); ddata->irq = platform_get_irq_byname(pdev, "adcdone"); - if (!ddata->irq) + if (ddata->irq < 0) return -ENODEV; error = devm_request_threaded_irq(&pdev->dev, ddata->irq, NULL,