From: Peter Korsgaard <jacmet@sunsite.dk>
Date: Fri, 25 Feb 2011 17:30:46 +0000 (-0800)
Subject: Input: evdev - fix evdev_write return value on partial writes
X-Git-Tag: v2.6.39-rc1~410^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=439581ec07fa9cf3f519dd461a2cf41cfd3adcb4;p=pandora-kernel.git

Input: evdev - fix evdev_write return value on partial writes

As was recently brought up on the busybox list
(http://lists.busybox.net/pipermail/busybox/2011-January/074565.html),
evdev_write doesn't properly check the count argument, which will
lead to a return value > count on partial writes if the remaining bytes
are accessible - causing userspace confusion.

Fix it by only handling each full input_event structure and return -EINVAL
if less than 1 struct was written, similar to how it is done in evdev_read.

Reported-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

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