On Fri, May 19, 2000, Al Borchers <[EMAIL PROTECTED]> wrote:
> I changed the locking to use spin_lock_irqsave, as Johannes suggested,
> and the problem seems to have gone away with usb-uhci.
That's promising.
> Ironically, I still get an oops with uhci. I will test further and let
> you know more soon. The oops with uhci is below.
Hmm, that is not good.
> I should mention that I use control-C from the terminal to send SIGINT
> to the test program to tell it to print stats (that is the way it was
> designed). The crash seems to happen when I press control-C.
Is it very reproducible when you hit Ctrl-C or does it only happen
sometimes?
> >>EIP; c8835d26 <[usb-serial].text.end+72/10c> <=====
The above line...
> Trace; c882e63a <[uhci]uhci_transfer_result+10a/168>
> Trace; c882f3cb <[uhci]uhci_interrupt+11f/15c>
> Trace; c01a9840 <ide_dma_intr+0/a0>
> Trace; c010cca6 <handle_IRQ_event+4e/78>
> Trace; c010ce99 <do_IRQ+99/ec>
> Code; c8835d26 <[usb-serial].text.end+72/10c>
> 00000000 <_EIP>:
> Code; c8835d26 <[usb-serial].text.end+72/10c> <=====
> 0: 80 7d 00 00 cmpb $0x0,0x0(%ebp) <=====
> Code; c8835d2a <[usb-serial].text.end+76/10c>
> 4: f3 90 repz nop
> Code; c8835d2c <[usb-serial].text.end+78/10c>
> 6: 7e f8 jle 0 <_EIP>
> Code; c8835d2e <[usb-serial].text.end+7a/10c>
> 8: e9 2a f6 ff ff jmp fffff637 <_EIP+0xfffff637> c883535d
> <[usb-serial]digi_write_bulk_callback+135/1f8>
and these lines cause me to believe that there's still a bug somewhere in
your driver.
This assembly dump looks like it's in the spinlock code:
"cmpb $0,%0\n\t" \
"rep;nop\n\t" \
"jle 2b\n\t" \
"jmp 1b\n" \
> Code; c8835d33 <[usb-serial].text.end+7f/10c>
> d: 80 3e 00 cmpb $0x0,(%esi)
> Code; c8835d36 <[usb-serial].text.end+82/10c>
> 10: f3 90 repz nop
> Code; c8835d38 <[usb-serial].text.end+84/10c>
> 12: 7e f9 jle d <_EIP+0xd> c8835d33
> <[usb-serial].text.end+7f/10c>
Did you try the "#define static" trick?
JE
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