Commit 3fee37c1 authored Jan 06, 2008 by Akos Maroy Committed by Linus Torvalds Jan 06, 2008

fix: using joysticks in 32 bit applications on 64 bit systems

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.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 7b3d9545

fs/compat_ioctl.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,8 @@
		* ioctls.
		*/

		#include <linux/joystick.h>

		#include <linux/types.h>
		#include <linux/compat.h>
		#include <linux/kernel.h>
		@@ -2642,6 +2644,12 @@ COMPATIBLE_IOCTL(VIDEO_SET_ATTRIBUTES)
		COMPATIBLE_IOCTL(VIDEO_GET_SIZE)
		COMPATIBLE_IOCTL(VIDEO_GET_FRAME_RATE)

		/* joystick */
		COMPATIBLE_IOCTL(JSIOCGVERSION)
		COMPATIBLE_IOCTL(JSIOCGAXES)
		COMPATIBLE_IOCTL(JSIOCGBUTTONS)
		COMPATIBLE_IOCTL(JSIOCGNAME(0))

		/* now things that need handlers */
		HANDLE_IOCTL(MEMREADOOB32, mtd_rw_oob)
		HANDLE_IOCTL(MEMWRITEOOB32, mtd_rw_oob)

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