lkml.org 
[lkml]   [2009]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: libusb broken on 2.6.28 x86_64 ?
Mark Lord wrote:
> I'm trying to use 2.6.28 for the first time on an x86_64 box here
> with devices controlled by libusb. The devices work on the first
> access, but then fail on all subsequent accesses. Unplugging/replugging
> causes them to work again for a single subsequent access.
>
> This is with two completely different USB gadgets:
> a VFD alphanumeric display, and an FTDI serial device in bitbang mode.
>
> Did something break in 2.6.28 for libusb devices ??
..

Mmm.. broken only for 64-bit userspace, it seems.

I've recompiled the same app against 32-bit libs,
and it works just fine on that 64-bit system,
as well as on 32-bit systems.

But not when compiled for pure 64-bit operation on a 64-bit system.

Looks tricky .. must be a change somewhere that assumes
a pointer/long is 32-bits or something.

-ml


\
 
 \ /
  Last update: 2009-01-02 08:05    [from the cache]
©2003-2011 Jasper Spaans