From: Dima Zavin <dima@android.com>
Date: Fri, 30 Dec 2011 23:16:44 +0000 (-0800)
Subject: Input: evdev - if no events and non-block, return EAGAIN not 0
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e90f869cae3b4aedf0f6d2ca8048d60245ee77f7;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

Input: evdev - if no events and non-block, return EAGAIN not 0

Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

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;
 }