Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Lars-Peter Clausen <lars@metafoo.de>,
        Alexandru Ardelean <alexandru.ardelean@analog.com>,
        "Stable@vger.kernel.org" <Stable@vger.kernel.org>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 089/131] iio: ad9523: Fix return value for
 ad952x_store()
Thread-Topic: [PATCH AUTOSEL 4.18 089/131] iio: ad9523: Fix return value for
 ad952x_store()
Thread-Index: AQHUQr2MZk2FNayFgES5eT2eSIoPmA==
Date:   Sun, 2 Sep 2018 13:04:57 +0000
Message-ID: <20180902064601.183036-89-alexander.levin@microsoft.com>
References: <20180902064601.183036-1-alexander.levin@microsoft.com>
In-Reply-To: <20180902064601.183036-1-alexander.levin@microsoft.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: microsoft.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 12b683a1-2996-480e-7a76-08d610d4b0db
X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Sep 2018 13:04:57.1130
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0741
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: Lars-Peter Clausen <lars@metafoo.de>

[ 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 <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes: cd1678f96329 ("iio: frequency: New driver for AD9523 SPI Low Jitter =
Clock Generator")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 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 ddb6a334ae68..0840288c2e7c 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