6.14-stable review patch. If anyone has any objections, please let me know.
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From: Uwe Kleine-König u.kleine-koenig@baylibre.com
[ Upstream commit 7021d97fb89b216557561ca8cdf68144c016993b ]
While a calibration is running, better don't make the device do anything else.
To enforce that, grab direct mode during calibration.
Fixes: 031bdc8aee01 ("iio: adc: ad7173: add calibration support") Signed-off-by: Uwe Kleine-König u.kleine-koenig@baylibre.com Link: https://patch.msgid.link/8319fa2dc881c9899d60db4eba7fe8e984716617.1740655250... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/ad7173.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index 6c4ed10ae580d..6645a811764fd 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -559,6 +559,9 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev, if (ret) return ret;
+ if (!iio_device_claim_direct(indio_dev)) + return -EBUSY; + mode = st->channels[chan->channel].syscalib_mode; if (sys_calib) { if (mode == AD7173_SYSCALIB_ZERO_SCALE) @@ -569,6 +572,8 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev, chan->address); }
+ iio_device_release_direct(indio_dev); + return ret ? : len; }