Subject: Re: linux-next: Tree for July 30

From: Dmitry Torokhov <[email-masked]>
Date: Thu, 31 Jul 2008 10:07:09 -0400

On Wed, Jul 30, 2008 at 11:10:29PM -0700, Andrew Morton wrote:
> On Wed, 30 Jul 2008 17:06:35 +1000 Stephen Rothwell <[email-masked]> wrote:
> 
> > I have created today's linux-next tree at
> > git://git.kernel.org/pub/scm/linux/kernel/git/sfr/linux-next.git
> 
> The X server broke on my FC8 t61p thinkpad.  Mainline is OK.
> 
> Various information is at http://userweb.kernel.org/~akpm/mo/
> 
> I'm suspecting the input layer - my synaptics device seems to have
> disappeared?  See http://userweb.kernel.org/~akpm/mo/Xorg-log-diff.txt
> 

I think this patch should help with Synaptics:

From: Dmitry Torokhov <[email-masked]>
Subject: [PATCH] Fix crash on kernels with extended keymap space

The len argument of EVIOCGBIT(ev,len) is the size of the receiving
buffer in bytes, not maximim number of bits to retrieve.

Signed-off-by: Dmitry Torokhov <[email-masked]>
---
 eventcomm.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/eventcomm.c b/eventcomm.c
index e3257cd..2d0a347 100644
--- a/eventcomm.c
+++ b/eventcomm.c
@@ -89,7 +89,7 @@ event_query_is_touchpad(int fd)
 
     /* Check for ABS_X, ABS_Y, ABS_PRESSURE and BTN_TOOL_FINGER */
 
-    SYSCALL(ret = ioctl(fd, EVIOCGBIT(0, EV_MAX), evbits));
+    SYSCALL(ret = ioctl(fd, EVIOCGBIT(0, sizeof(evbits)), evbits));
     if (ret < 0)
 	return FALSE;
     if (!TEST_BIT(EV_SYN, evbits) ||
@@ -97,7 +97,7 @@ event_query_is_touchpad(int fd)
 	!TEST_BIT(EV_KEY, evbits))
 	return FALSE;
 
-    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, KEY_MAX), evbits));
+    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(evbits)), evbits));
     if (ret < 0)
 	return FALSE;
     if (!TEST_BIT(ABS_X, evbits) ||
@@ -105,7 +105,7 @@ event_query_is_touchpad(int fd)
 	!TEST_BIT(ABS_PRESSURE, evbits))
 	return FALSE;
 
-    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, KEY_MAX), evbits));
+    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(evbits)), evbits));
     if (ret < 0)
 	return FALSE;
     if (!TEST_BIT(BTN_TOOL_FINGER, evbits))
-- 
1.5.5.1