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-rw-r--r--drivers/input/evdev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 03344b3c7c1..a9d871651ce 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -412,6 +412,9 @@ static ssize_t evdev_read(struct file *file, char __user *buffer,
retval += input_event_size();
}
+ if (retval == 0 && (file->f_flags & O_NONBLOCK))
+ return -EAGAIN;
+
return retval;
}