From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f68.google.com ([74.125.83.68]:32924 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756924AbdCUNaq (ORCPT ); Tue, 21 Mar 2017 09:30:46 -0400 From: Arushi Singhal To: jic23@kernel.org Cc: knaack.h@gmx.de, outreachy-kernel@googlegroups.com, Michael.Hennerich@analog.com, lars@metafoo.de, gregkh@linuxfoundation.org, speakup@linux-speakup.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, pmeerw@pmeerw.net, linux-iio@vger.kernel.org, Arushi Singhal Subject: [PATCH 1/2] staging: ad7759: Replace mlock with driver private lock Date: Tue, 21 Mar 2017 19:00:18 +0530 Message-Id: <20170321133021.6737-2-arushisinghal19971997@gmail.com> In-Reply-To: <20170321133021.6737-1-arushisinghal19971997@gmail.com> References: <20170321133021.6737-1-arushisinghal19971997@gmail.com> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org The IIO subsystem is redefining iio_dev->mlock to be used by the IIO core only for protecting device operating mode changes. ie. Changes between INDIO_DIRECT_MODE, INDIO_BUFFER_* modes. In this driver, mlock was being used to protect hardware state changes. Replace it with a lock in the devices global data. Signed-off-by: Arushi Singhal --- drivers/staging/iio/meter/ade7759.c | 4 ++-- drivers/staging/iio/meter/ade7759.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c index 944ee3401029..1d1e0b33021f 100644 --- a/drivers/staging/iio/meter/ade7759.c +++ b/drivers/staging/iio/meter/ade7759.c @@ -381,7 +381,7 @@ static ssize_t ade7759_write_frequency(struct device *dev, if (!val) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->buf_lock); t = 27900 / val; if (t > 0) @@ -402,7 +402,7 @@ static ssize_t ade7759_write_frequency(struct device *dev, ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg); out: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->buf_lock); return ret ? ret : len; } diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h index f0716d2fdf8e..4f69bb93cc45 100644 --- a/drivers/staging/iio/meter/ade7759.h +++ b/drivers/staging/iio/meter/ade7759.h @@ -42,6 +42,7 @@ * @buf_lock: mutex to protect tx and rx * @tx: transmit buffer * @rx: receive buffer + * @lock protect sensor state **/ struct ade7759_state { struct spi_device *us; -- 2.11.0