From: Alexandru Ardelean alexandru.ardelean@analog.com
[ Upstream commit 9b7a12c3e090cf3fba6f66f1f23abbc6e0e86021 ]
The iio_triggered_buffer_{predisable,postenable} functions attach/detach the poll functions.
For the predisable hook, the disable code should occur before detaching the poll func, and for the postenable hook, the poll func should be attached before the enable code.
This change reworks the predisable/postenable hooks so that the pollfunc is attached/detached in the correct position. It also balances the calls a bit, by grouping the preenable and the iio_triggered_buffer_postenable() into a single isl29125_buffer_postenable() function.
Signed-off-by: Alexandru Ardelean alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/light/isl29125.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/iio/light/isl29125.c b/drivers/iio/light/isl29125.c index e2945a20e5f6..60388a41ec8c 100644 --- a/drivers/iio/light/isl29125.c +++ b/drivers/iio/light/isl29125.c @@ -215,13 +215,24 @@ static const struct iio_info isl29125_info = { .driver_module = THIS_MODULE, };
-static int isl29125_buffer_preenable(struct iio_dev *indio_dev) +static int isl29125_buffer_postenable(struct iio_dev *indio_dev) { struct isl29125_data *data = iio_priv(indio_dev); + int err; + + err = iio_triggered_buffer_postenable(indio_dev); + if (err) + return err;
data->conf1 |= ISL29125_MODE_RGB; - return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, + err = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, data->conf1); + if (err) { + iio_triggered_buffer_predisable(indio_dev); + return err; + } + + return 0; }
static int isl29125_buffer_predisable(struct iio_dev *indio_dev) @@ -229,19 +240,18 @@ static int isl29125_buffer_predisable(struct iio_dev *indio_dev) struct isl29125_data *data = iio_priv(indio_dev); int ret;
- ret = iio_triggered_buffer_predisable(indio_dev); - if (ret < 0) - return ret; - data->conf1 &= ~ISL29125_MODE_MASK; data->conf1 |= ISL29125_MODE_PD; - return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, + ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, data->conf1); + + iio_triggered_buffer_predisable(indio_dev); + + return ret; }
static const struct iio_buffer_setup_ops isl29125_buffer_setup_ops = { - .preenable = isl29125_buffer_preenable, - .postenable = &iio_triggered_buffer_postenable, + .postenable = isl29125_buffer_postenable, .predisable = isl29125_buffer_predisable, };