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SubjectRe: [linux-usb-devel] [patch] usb-uhci.c: fix for PCI-lockups/IRQ problems
Georg Acher wrote:

> Hi,
> test12-pre3 had a large set of patches to usb-uhci.c. One small detail of
> this patch can make the driver to lockup the PCI bus with certain UHCI-chips
> (only Intel but not VIA, of course not on my machines...). This patch should
> fix that.
> It also includes Linus' patch for the IRQ-setup.
>

I am testing with this patch applied.

Here's an OOPS I got when plugging and unplugging my USB
mouse multiple times.

Unable to handle kernel paging request at virtual address 01cc0035
c589352c
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c589352c>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: 01cc0011 ebx: 5508ec83 ecx: c4d39ef4 edx: c4a22b20
esi: c4a22b20 edi: c4d39f18 ebp: 00000064 esp: c4d39eb4
ds: 0018 es: 0018 ss: 0018
Process khubd (pid: 104, stackpage=c4d39000)
Stack: c4d39f08 c4a22b20 c4d39f18 00000064 00000000 00000286 c5825f46
c4a22b20
c582605a c4a22b20 c1fbd400 80000180 c1d39600 c4d39fdc c4d38000
c4d39f08
c4d39f08 00000000 00000000 c4d39f0c c4d39f0c 00000000 c4d39f20
c4d39f20
Call Trace: [<c5825f46>] [<c582605a>] [<c5826183>] [<c5826210>]
[<c582855d>] [<c5829324>] [<c582fcc8>]
[<c58310cc>] [<c5829515>] [<c0108f0f>] [<c5825000>] [<c5827dbc>]
Code: 8b 40 24 89 44 24 14 83 78 10 00 75 0a b8 ed ff ff ff e9 4f

>>EIP; c589352c <[usb-uhci]uhci_submit_urb+1c/28c> <=====
Trace; c5825f46 <[usbcore]usb_submit_urb+1e/30>
Trace; c582605a <[usbcore]usb_start_wait_urb+aa/174>
Trace; c5826183 <[usbcore]usb_internal_control_msg+5f/74>
Trace; c5826210 <[usbcore]usb_control_msg+78/98>
Trace; c582855d <[usbcore]usb_get_port_status+35/3c>
Trace; c5829324 <[usbcore]usb_hub_events+b0/27c>
Trace; c582fcc8 <[usbcore]usb_bandwidth_option+26e0/271c>
Trace; c58310cc <[usbcore]khubd_wait+4/c>
Trace; c5829515 <[usbcore]usb_hub_thread+25/4c>
Trace; c0108f0f <kernel_thread+23/30>
Trace; c5825000 <[nls_iso8859-1].data.end+15e5/1645>
Trace; c5827dbc <[usbcore]init_module+0/0>
Code; c589352c <[usb-uhci]uhci_submit_urb+1c/28c>
00000000 <_EIP>:
Code; c589352c <[usb-uhci]uhci_submit_urb+1c/28c> <=====
0: 8b 40 24 mov 0x24(%eax),%eax <=====
Code; c589352f <[usb-uhci]uhci_submit_urb+1f/28c>
3: 89 44 24 14 mov %eax,0x14(%esp,1)
Code; c5893533 <[usb-uhci]uhci_submit_urb+23/28c>
7: 83 78 10 00 cmpl $0x0,0x10(%eax)
Code; c5893537 <[usb-uhci]uhci_submit_urb+27/28c>
b: 75 0a jne 17 <_EIP+0x17> c5893543
<[usb-uhci]uhci_submit_urb+33/28c>
Code; c5893539 <[usb-uhci]uhci_submit_urb+29/28c>
d: b8 ed ff ff ff mov $0xffffffed,%eax
Code; c589353e <[usb-uhci]uhci_submit_urb+2e/28c>
12: e9 4f 00 00 00 jmp 66 <_EIP+0x66> c5893592
<[usb-uhci]uhci_submit_urb+82/28c>


I hope this helps,

Miles

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