linux-kernel - [PATCH 2/3] input: evdev: if no events and non-block, return EAGAIN not 0

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Date:	Fri, 16 Dec 2011 10:07:05 -0800
From:	Dima Zavin <dima@...roid.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dima Zavin <dima@...roid.com>,
	Jeff Brown <jeffbrown@...roid.com>
Subject: [PATCH 2/3] input: evdev: if no events and non-block, return EAGAIN not 0

Cc: Jeff Brown <jeffbrown@...roid.com>
Signed-off-by: Dima Zavin <dima@...roid.com>
---
 drivers/input/evdev.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 03344b3..2e563af 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -412,6 +412,8 @@ static ssize_t evdev_read(struct file *file, char __user *buffer,
 		retval += input_event_size();
 	}
 
+	if (retval == 0 && file->f_flags & O_NONBLOCK)
+		retval = -EAGAIN;
 	return retval;
 }
 
-- 
1.7.3.1

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