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From:   Shreeya Patel <shreeya.patel23498@gmail.com>
To:     lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org,
        knaack.h@gmx.de, pmeerw@pmeerw.net, gregkh@linuxfoundation.org,
        linux-iio@vger.kernel.org, devel@driverdev.osuosl.org,
        linux-kernel@vger.kernel.org
Cc:     Shreeya Patel <shreeya.patel23498@gmail.com>
Subject: [PATCH] Staging: iio: ade7758: Remove iio_dev mlock
Date:   Mon, 29 Jan 2018 20:19:26 +0530
Message-Id: <1517237366-4818-1-git-send-email-shreeya.patel23498@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In the ade7758 file, read raw does not require iio_dev->mlock for
reads. It can run concurrently as resource protection is handled
by buf_lock in ade7758_spi_read_reg_8()

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
 drivers/staging/iio/meter/ade7758_core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c
index 7b7ffe5..227dbfc 100644
--- a/drivers/staging/iio/meter/ade7758_core.c
+++ b/drivers/staging/iio/meter/ade7758_core.c
@@ -526,9 +526,7 @@ static int ade7758_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SAMP_FREQ:
-		mutex_lock(&indio_dev->mlock);
 		ret = ade7758_read_samp_freq(&indio_dev->dev, val);
-		mutex_unlock(&indio_dev->mlock);
 		return ret;
 	default:
 		return -EINVAL;
-- 
2.7.4