patch for using joysticks in 32 bit applications on 64 bit systems

[Ákos Maróy <darkeye@tyrell.hu>]

unfortunately 32 bit apps don't see the joysticks on a 64 bit system.
this prevents one playing X-Plane (http://www.x-plane.com/) or other
32-bit games with joysticks.

this is a known issue, and already raised several times:

http://readlist.com/lists/vger.kernel.org/linux-kernel/28/144411.html

http://www.brettcsmith.org/wiki/wiki.cgi?action=browse&diff=1&id=OzyComputer/Joystick

unfortunately this is still not fixed in the mainline kernel.

it would be nice to have this fixed, so that people can play these games
without having to patch their kernel.

the following patch solves the problem on 2.6.22:


diff -Naur linux-2.6.22-suspend2-r2/fs/compat_ioctl.c
linux-2.6.22-suspend2-r2-joystick/fs/compat_ioctl.c
--- linux-2.6.22-suspend2-r2/fs/compat_ioctl.c  2007-12-22
14:08:14.000000000
+0100
+++ linux-2.6.22-suspend2-r2-joystick/fs/compat_ioctl.c 2007-12-22
14:07:54.000000000 +0100
@@ -10,6 +10,8 @@
  * ioctls.
  */

+#include <linux/joystick.h>
+
 #include <linux/types.h>
 #include <linux/compat.h>
 #include <linux/kernel.h>
@@ -3259,6 +3261,12 @@
 COMPATIBLE_IOCTL(VIDEO_GET_SIZE)
 COMPATIBLE_IOCTL(VIDEO_GET_FRAME_RATE)

+/* joystick */
+COMPATIBLE_IOCTL(JSIOCGVERSION)
+COMPATIBLE_IOCTL(JSIOCGAXES)
+COMPATIBLE_IOCTL(JSIOCGBUTTONS)
+COMPATIBLE_IOCTL(JSIOCGNAME(0x200)) /* for X-Plane 8.03 */
+
 /* now things that need handlers */
 HANDLE_IOCTL(MEMREADOOB32, mtd_rw_oob)
 HANDLE_IOCTL(MEMWRITEOOB32, mtd_rw_oob)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/