From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Mallon Subject: [PATCH 1/2] input: Return the number of bytes written so far on evdev write failure Date: Wed, 18 Sep 2013 08:55:43 +1000 Message-ID: <1379458544-6508-1-git-send-email-rmallon@gmail.com> Return-path: Received: from mail-pb0-f45.google.com ([209.85.160.45]:56646 "EHLO mail-pb0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753371Ab3IQWzx (ORCPT ); Tue, 17 Sep 2013 18:55:53 -0400 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: carl@ok-labs.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Ryan Mallon If input_event_from_user() fails in evdev write() and at least one event has been written successfully then return the number of bytes written. If no events have been written, then the EFAULT error is returned. Signed-off-by: Ryan Mallon --- drivers/input/evdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index d2b34fb..b0dec2ba 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -437,7 +437,8 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, while (retval + input_event_size() <= count) { if (input_event_from_user(buffer + retval, &event)) { - retval = -EFAULT; + if (retval == 0) + retval = -EFAULT; goto out; } retval += input_event_size(); -- 1.7.9.7