From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr680103.outbound.protection.outlook.com ([40.107.68.103]:45024 "EHLO NAM04-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729883AbeIBRam (ORCPT ); Sun, 2 Sep 2018 13:30:42 -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 4.9 38/62] iio: ad9523: Fix return value for ad952x_store() Date: Sun, 2 Sep 2018 13:14:51 +0000 Message-ID: <20180902131411.183978-28-alexander.levin@microsoft.com> References: <20180902131411.183978-1-alexander.levin@microsoft.com> In-Reply-To: <20180902131411.183978-1-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 99eba524f6dd..26caf7cc1db9 100644 --- a/drivers/iio/frequency/ad9523.c +++ b/drivers/iio/frequency/ad9523.c @@ -508,7 +508,7 @@ 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