[PATCH v4 5/7] iio: adc: exynos: Use input_device_enabled()

[Andrzej Pietrasiewicz]

A new helper is available, so use it. Inspecting 'users' member of
input_dev requires taking device's mutex.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
---
 drivers/iio/adc/exynos_adc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 22131a677445..9a1ddda8c5db 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -633,7 +633,9 @@ static irqreturn_t exynos_ts_isr(int irq, void *dev_id)
 	bool pressed;
 	int ret;
 
-	while (info->input->users) {
+	mutex_lock(&info->input->mutex);
+	while (input_device_enabled(info->input)) {
+		mutex_unlock(&info->input->mutex);
 		ret = exynos_read_s3c64xx_ts(dev, &x, &y);
 		if (ret == -ETIMEDOUT)
 			break;
@@ -651,6 +653,8 @@ static irqreturn_t exynos_ts_isr(int irq, void *dev_id)
 		input_sync(info->input);
 
 		usleep_range(1000, 1100);
+
+		mutex_lock(&info->input->mutex);
 	}
 
 	writel(0, ADC_V1_CLRINTPNDNUP(info->regs));
-- 
2.17.1