[PATCH AUTOSEL for 4.9 044/281] iio: pressure: zpa2326: report interrupted case as failure

[Sasha Levin]

From: Nicholas Mc Guire <der.h...@hofr.at>

[ Upstream commit e7215fe4d51e69c9d2608ad0c409d48e844d0adc ]

If the timeout-case prints a warning message then probably the interrupted
case should also. Further, wait_for_completion_interruptible_timeout()
returns long not int.

Fixes: commit 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support")
Signed-off-by: Nicholas Mc Guire <der.h...@hofr.at>
Signed-off-by: Jonathan Cameron <ji...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/iio/pressure/zpa2326.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
index 19d2eb46fda6..2a4a62ebfd8d 100644
--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -871,12 +871,13 @@ static int zpa2326_wait_oneshot_completion(const struct 
iio_dev   *indio_dev,
 {
        int          ret;
        unsigned int val;
+       long     timeout;
 
        zpa2326_dbg(indio_dev, "waiting for one shot completion interrupt");
 
-       ret = wait_for_completion_interruptible_timeout(
+       timeout = wait_for_completion_interruptible_timeout(
                &private->data_ready, ZPA2326_CONVERSION_JIFFIES);
-       if (ret > 0)
+       if (timeout > 0)
                /*
                 * Interrupt handler completed before timeout: return operation
                 * status.
@@ -886,13 +887,16 @@ static int zpa2326_wait_oneshot_completion(const struct 
iio_dev   *indio_dev,
        /* Clear all interrupts just to be sure. */
        regmap_read(private->regmap, ZPA2326_INT_SOURCE_REG, &val);
 
-       if (!ret)
+       if (!timeout) {
                /* Timed out. */
+               zpa2326_warn(indio_dev, "no one shot interrupt occurred (%ld)",
+                            timeout);
                ret = -ETIME;
-
-       if (ret != -ERESTARTSYS)
-               zpa2326_warn(indio_dev, "no one shot interrupt occurred (%d)",
-                            ret);
+       } else if (timeout < 0) {
+               zpa2326_warn(indio_dev,
+                            "wait for one shot interrupt cancelled");
+               ret = -ERESTARTSYS;
+       }
 
        return ret;
 }
-- 
2.14.1