From 0ee005c7dc2803125275e24598f0fb37775a6af3 Mon Sep 17 00:00:00 2001 From: Frank Zago Date: Wed, 13 Nov 2013 22:53:00 +0000 Subject: iio:accel:kxsd9 fix missing mutex unlock This will leave a lock held after reading from the device, preventing any further reads. Signed-off-by: Frank Zago Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron --- drivers/iio/accel/kxsd9.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c index d72118d1189c..98ba761cbb9c 100644 --- a/drivers/iio/accel/kxsd9.c +++ b/drivers/iio/accel/kxsd9.c @@ -112,9 +112,10 @@ static int kxsd9_read(struct iio_dev *indio_dev, u8 address) mutex_lock(&st->buf_lock); st->tx[0] = KXSD9_READ(address); ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers)); - if (ret) - return ret; - return (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0); + if (!ret) + ret = (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0); + mutex_unlock(&st->buf_lock); + return ret; } static IIO_CONST_ATTR(accel_scale_available, -- cgit v1.2.3