[sane-devel] Re: [linux-usb-devel] Bad Performance uhci (vs. usb-ohci ,ohci) ->2.4.18pre9 breaks libusb-0.1.4

[Gunther Mayer]

Greg KH wrote:
> 
> On Sun, Feb 10, 2002 at 11:10:07AM +0100, Gunther Mayer wrote:
> > Hi,
> > the "uhci" module suffers from very bad performance (linux-2.4.17).
> >
> > Scanning 150dpi A4 (merlin670 for Canon N670U over libusb-0.1.4) gives:
> >   uhci:    135 sec.
> >   usb-uhci: 43 sec.
> >   ohci:     35 sec
> 
> This should be fixed in the latest 2.4.18-pre patches.  Can you grab the
> latest one, and let us know if you still have the same problems with the
> uhci driver?


2.4.18pre9 breaks "libusb-0.1.4" and so my application:

 mc:~/libusb-0.1.4/tests # ./testlibusb 
 bus/device  idVendor/idProduct
 bus=0x8049de8 dev=0x1029
 001
 Segmentation fault (core dumped)

I added some printks, the "dev" pointer seems buggy.