Date: Mon, 12 Sep 2005 14:59:05 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Mathieu PREVOT <mathieu-prevot@wanadoo.fr> Cc: freebsd-usb@freebsd.org Subject: Re: kernel panic with pure usb2umass pluged on pure usb1only motherboard port Message-ID: <200509121459.07106.hselasky@c2i.net> In-Reply-To: <6113f70d5dfb0d1abb6c95cd38085487@wanadoo.fr> References: <a751adad46867a82adb4da6a698d14cc@wanadoo.fr> <200509111945.03677.hselasky@c2i.net> <6113f70d5dfb0d1abb6c95cd38085487@wanadoo.fr>
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On Monday 12 September 2005 11:26, Mathieu PREVOT wrote:
> > Do you see something like this at the end of "sysctl -a"
> >
> > dev.umass.0.%desc: Genesys USB2.0 card Reader, rev 2.00/91.38, addr 122
> > dev.umass.0.%driver: umass
> > dev.umass.0.%location: port=5 interface=0
> > dev.umass.0.%pnpinfo: vendor=0x05e3 product=0x0710 devclass=0x00
> > devsubclass=0x0
> > 0 sernum="00571" intclass=0x08 intsubclass=0x06
> > dev.umass.0.%parent: uhub0
>
> I have this with usb1&2umass (txt_sysctl_with_umass2) but nothing with
> pure usb2umass
What do you mean with "pure USB 2.0":
a) With only ehci compiled into the kernel?
b) Or a USB2.0 only device?
If there are no "dev.umass" strings shown when you type "sysctl -a |grep
umass" and you have plugged a umass device, then I have locked the problem
down to the following. Some device is writing to freed memory, or maybe there
is something else wrong. In the file "/sys/kern/subr_bus.c", in the function
"make_device()", add:
if(dev)
{
u_int8_t *temp = (void *)(dev);
u_int16_t len = sizeof(struct device);
while(len) {
if(temp[0])
{
printf("%s: dirty memory 0x%02x!\n", __FUNCTION__, temp[0]);
break;
}
temp++;
len--;
}
bzero(dev,sizeof(struct device));
}
after:
dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT|M_ZERO);
Then recompile the kernel.
>
Another thing:
Have you recompiled and installed all modules, or are you using the modules
supplied with FreeBSD 5.4 ?
> Maybe I can configure a dump device for the kernel panic ? How ?
--HPS
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