From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-cys01nam02on0107.outbound.protection.outlook.com ([104.47.37.107]:15264 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728738AbeIBRc1 (ORCPT ); Sun, 2 Sep 2018 13:32:27 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Lars-Peter Clausen , Alexandru Ardelean , "Stable@vger.kernel.org" , Jonathan Cameron , Sasha Levin Subject: [PATCH AUTOSEL 4.4 28/47] iio: ad9523: Fix return value for ad952x_store() Date: Sun, 2 Sep 2018 13:16:13 +0000 Message-ID: <20180902131533.184092-28-alexander.levin@microsoft.com> References: <20180902131533.184092-1-alexander.levin@microsoft.com> In-Reply-To: <20180902131533.184092-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Lars-Peter Clausen [ Upstream commit 9a5094ca29ea9b1da301b31fd377c0c0c4c23034 ] A sysfs write callback function needs to either return the number of consumed characters or an error. The ad952x_store() function currently returns 0 if the input value was "0", this will signal that no characters have been consumed and the function will be called repeatedly in a loop indefinitely. Fix this by returning number of supplied characters to indicate that the whole input string has been consumed. Signed-off-by: Lars-Peter Clausen Signed-off-by: Alexandru Ardelean Fixes: cd1678f96329 ("iio: frequency: New driver for AD9523 SPI Low Jitter = Clock Generator") Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/frequency/ad9523.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.= c index 44a30f286de1..ea3c65366e00 100644 --- a/drivers/iio/frequency/ad9523.c +++ b/drivers/iio/frequency/ad9523.c @@ -507,7 +507,7 @@ static ssize_t ad9523_store(struct device *dev, return ret; =20 if (!state) - return 0; + return len; =20 mutex_lock(&indio_dev->mlock); switch ((u32)this_attr->address) { --=20 2.17.1