6.14-stable review patch. If anyone has any objections, please let me know.
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From: Angelo Dureghello adureghello@baylibre.com
[ Upstream commit 0f65f59e632d942cccffd12c36036c24eb7037eb ]
Protect register (and bus) access from concurrent read / write. Needed in the backend operating mode.
Signed-off-by: Angelo Dureghello adureghello@baylibre.com Link: https://patch.msgid.link/20250210-wip-bl-ad7606_add_backend_sw_mode-v4-7-160... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/ad7606.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 0339e27f92c32..1c547e8d52ac0 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -862,7 +862,12 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, } val = (val * MICRO) + val2; i = find_closest(val, scale_avail_uv, cs->num_scales); + + ret = iio_device_claim_direct_mode(indio_dev); + if (ret < 0) + return ret; ret = st->write_scale(indio_dev, ch, i + cs->reg_offset); + iio_device_release_direct_mode(indio_dev); if (ret < 0) return ret; cs->range = i; @@ -873,7 +878,12 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, return -EINVAL; i = find_closest(val, st->oversampling_avail, st->num_os_ratios); + + ret = iio_device_claim_direct_mode(indio_dev); + if (ret < 0) + return ret; ret = st->write_os(indio_dev, i); + iio_device_release_direct_mode(indio_dev); if (ret < 0) return ret; st->oversampling = st->oversampling_avail[i];