[PATCH 3.16.y-ckt 028/133] iio: event: Remove negative error code from iio_event_poll

From: Luis Henriques
Date: Wed Sep 30 2015 - 06:33:00 EST

3.16.7-ckt18 -stable review patch. If anyone has any objections, please let me know.


From: Cristina Opriceana <cristina.opriceana@xxxxxxxxx>

commit 41d903c00051d8f31c98a8136edbac67e6f8688f upstream.

Negative return values are not supported by iio_event_poll since
its return type is unsigned int.

Fixes: f18e7a068a0a3 ("iio: Return -ENODEV for file operations if the device has been unregistered")

Signed-off-by: Cristina Opriceana <cristina.opriceana@xxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/iio/industrialio-event.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index ad7a35f63a16..57672c96566d 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -84,7 +84,7 @@ static unsigned int iio_event_poll(struct file *filep,
unsigned int events = 0;

if (!indio_dev->info)
- return -ENODEV;
+ return events;

poll_wait(filep, &ev_int->wait, wait);

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