[PATCH] iio: adc: nxp-sar-adc: notify trigger on channel read error in buffer ISR

[Stepan Ionichev <sozdayvek@gmail.com>]

nxp_sar_adc_isr_buffer() bails on the first channel-read failure
without calling iio_trigger_notify_done(), so a single I/O error
leaves the trigger's use_count stuck and the buffer flow wedged
until rebind.

Route the error exit through a 'done:' label that always calls
iio_trigger_notify_done().

Fixes: 4434072a893e ("iio: adc: Add the NXP SAR ADC support for the s32g2/3 platforms")
Cc: stable@vger.kernel.org
Signed-off-by: Stepan Ionichev <sozdayvek@gmail.com>
---
 drivers/iio/adc/nxp-sar-adc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/nxp-sar-adc.c b/drivers/iio/adc/nxp-sar-adc.c
index 9d9f2c76b..ed004812c 100644
--- a/drivers/iio/adc/nxp-sar-adc.c
+++ b/drivers/iio/adc/nxp-sar-adc.c
@@ -341,7 +341,7 @@ static void nxp_sar_adc_isr_buffer(struct iio_dev *indio_dev)
 		ret = nxp_sar_adc_read_data(info, info->buffered_chan[i]);
 		if (ret < 0) {
 			nxp_sar_adc_read_notify(info);
-			return;
+			goto done;
 		}
 
 		info->buffer[i] = ret;
@@ -352,6 +352,7 @@ static void nxp_sar_adc_isr_buffer(struct iio_dev *indio_dev)
 	iio_push_to_buffers_with_ts(indio_dev, info->buffer, sizeof(info->buffer),
 				    iio_get_time_ns(indio_dev));
 
+done:
 	iio_trigger_notify_done(indio_dev->trig);
 }
 
-- 
2.43.0