Hi,
On 19 Nov 2002 10:03:47 -0800
Pete Popov <ppopov@mvista.com> wrote:
> On Tue, 2002-11-19 at 09:54, Jun Sun wrote:
> > On Tue, Nov 19, 2002 at 01:29:22PM +0100, Ralf Baechle wrote:
> > > Hello double questionmark ;-)
> > >
> > > On Tue, Nov 19, 2002 at 08:09:07PM +0800, ?? wrote:
> > >
> > > > anyone successfully using usb hotplug function with linux mips kernel?
> > > >
> > > > http://marc.theaimsgroup.com/?l=linux-hotplug-devel&m=102954820511328&w=2
> > >
> > > There is nothing in the USB code that should be MIPS specific. Despite
> > > what Tom suspects everything is fine. 32-bit kernel symbols always start
> > > with 0xffffffff and the value of usbdevfs_cleanup is an artefact of the
> > > function having been discarded by the linker.
> > >
> >
> > Additional info:
> >
> > USB has been working on MIPS for well over a year now. There was a problem
> > early on due to non-coherent MIPS cache, but it was solved back then.
> >
> > We have been using USB on global span IVR successfully.
>
> ... among many other mips boards.
>
> > Maybe there are still some patches missing in linux-mips tree. I will
> > take a look later.
I don't have a problem with current CVS tree(linux_2_4 tag) and a small patch.
I tested by the following system.
Hot plug is fine.
NEC VR4122(Eagle)
USB OCHI Controller
SanDisk SDDR-31
128MB CF
I attached a small patch.
Yoichi
--- linux.orig/drivers/usb/hub.c Thu Sep 12 13:09:25 2002
+++ linux/drivers/usb/hub.c Wed Nov 20 11:43:34 2002
@@ -698,12 +698,6 @@
return;
}
- if (usb_hub_port_debounce(hub, port)) {
- err("connect-debounce failed, port %d disabled", port+1);
- usb_hub_port_disable(hub, port);
- return;
- }
-
down(&usb_address0_sem);
tempstr = kmalloc(1024, GFP_KERNEL);
