Date: Tue, 2 Jan 2001 11:24:38 -0800 (PST) From: Jon Simola <jon@abccom.bc.ca> To: Nick Hibma <n_hibma@calcaphon.com> Cc: hackers@freebsd.org Subject: Re: Broken-by-design USB device? Message-ID: <Pine.BSF.3.96.1010102110053.462F-100000@newmail.netbistro.com> In-Reply-To: <Pine.BSF.4.20.0012301255040.4807-100000@henny.webweaving.org>
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On Sat, 30 Dec 2000, Nick Hibma wrote:
> The panic is definitely bad. It happens straight after failing the
> attach?
Yep, but only during the kernel boot. Hot plugging the device after the system
is booted spews the same errors to the console but does not cause a panic:
uhid0: no report descriptor
device_probe_and_attach: uhid0 attach returned 6
> plug the device in again, and after it has panicked (it will drop into
> the debugger), type trace. That would give me a hint at where it
> crashes.
Here you go. If you need anything else, please ask.
kernel: type 12 trap, code=0
Stopped at DEVICE_PROBE+0xe: cmpl 0(%edx),%eax
db> trace
DEVICE_PROBE(c1142d00,c1142d00,c1139100,0,0) at DEVICE_PROBE+0xe
device_probe_child(c1139100,c1142d00,c1142e00,0,c1142e30) at
device_probe_child+0xc1
device_probe_and_attach(c1142d00) at device_probe_and_attach+0x29
usbd_probe_and_attach(c1139100,c1142e00,2,3,c1142e00) at
usbd_probe_and_attach+0xef
usbd_new_device(c1139100,c113a000,1,200,2,c11390c0) at usbd_new_device+0x1dd
uhub_explore(c1139280,c1139300,c1139e80,0,c0456e64) at uhub_explore+0x1d4
usb_attach(c1139300,c0456e7c,c01afc0b,c1139300,c113a000) at usb_attach+0xf1
DEVICE_ATTACH(c1139300,c113a000,c1139e80,0,c0456ea0) at DEVICE_ATTACH+0x2e
device_probe_and_attach(c1139300) at device_probe_and_attach+0x4f
uhci_pci_attach(c1139e80,c0456ec4,c01afc0b,c1139e80,c1139e80) at
uhci_pci_attach+0x33f
DEVICE_ATTACH(c1139e80,c1139e80,c1136400,0,c0456ed4) at DEVICE_ATTACH+0x2e
device_probe_and_attach(c1139e80) at device_probe_and_attach+0x4f
bus_generic_attach(c1136380,c0456ef8,c01afc0b,c1136380,c1136380) at
bus_generic_attach+0x16
DEVICE_ATTACH(c1136380,c1136380,c1136580,0,c0456f08) at DEVICE_ATTACH+0x2e
device_probe_and_attach(c1136380) at device_probe_and_attach+0x4f
bus_generic_attach(c1136400,c0456f2c,c01afc0b,c1136400,c1136400) at
bus_generic_attach+0x16
DEVICE_ATTACH(c1136400,c1136400,c0e25800,0,c0456f3c) at DEVICE_ATTACH+0x2e
device_probe_and_attach(c1136400) at device_probe_and_attach+0x4f
bus_generic_attach(c1136580,c1136580,c0456f58,c012740e,c1136580) at
bus_generic_attach+0x16
nexus_attach(c1136580,c0456f70,c01afc0b,c1136580,c1136580) at nexus_attach+0xd
DEVICE_ATTACH(c1136580,c1136580,c039a710,45b000,c0456f80) at
DEVICE_ATTACH+0x2e
device_probe_and_attach(c1136580) at device_probe_and_attach+0x4f
root_bus_configure(c0e25800,c036d38c,0) at root_bus_configure+0x16
configure(0,454c00,45b000,0,c0126df4) at configure+0x33
mi_startup(c0456fb4,b0206,ffe,45b000,c01b42f9) at mi_startup+0x70
begin() at begin+0x4b
> The controller probably requires some work because a fake report
> descriptor is needed to make it possible for the uhid driver to talk to
> it. It does not provide any information on where the information for the
> buttons and axes is stored in the descriptor returned on the interrupt
> pipe.
---
Jon Simola <jon@abccom.bc.ca> | "In the near future - corporate networks
Systems Administrator | reach out to the stars, electrons and light
ABC Communications | flow throughout the universe." -- GITS
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