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iio:accel:kxsd9 fix missing mutex unlock

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commit 0ee005c7dc upstream.

This will leave a lock held after reading from the device, preventing
any further reads.

Signed-off-by: Frank Zago <frank@zago.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Frank Zago 2013-11-13 22:53:00 +00:00 committed by Greg Kroah-Hartman
parent 8e7314052b
commit 1a2d670b28
1 changed files with 4 additions and 3 deletions
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7
drivers/iio/accel/kxsd9.c
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@ -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,