Ok, I figured out why the kernel oopses on urb submission or on
urb_unlink. My module and the usb module have different ideas about the
size of a spinlock. My module thinks it is 0 bytes and the usb module
thinks it is 4 bytes. This difference in size throws off the whole urb
structure and chaos ensues.
The question is why does my module think that a spinlock struct it 0
bytes? ie. sizeof(spinlock_t) returns 0.
I am new to kernel programming, so take it easy on me! Thanks.
> Sorry to answer my own mail.. My mistake, the device is not getting
> destroyed, just free_Dev gets called and then doesn't do anything. That
> isn't the problem, but I am still oopsing. Details later. thanks.
>
>
> > I am attempting to adapt the acm driver for use with my oewn device.
> >
> > It probes the device fine, but after that the first URB submission ends up
> > freeing the device. Details:
> >
> > At some point during/right after the URB submission uhci_interrupt gets
> > called and spits out the message:
> >
> > interrupt, status 3, frame# 1418
> >
> > process_urb gets called and in the last few lines of that function it
> > calls usb_dec_dev_use which is defined as usb_free_dev which then frees my
> > device.
> >
> > Eventually the kernel oopses, but this is no suprise since the device has
> > been freed unbeknownst to me.
> >
> > This may seem like a dumb question, but what are these interrupts? Why is
> > my device being freed? Thanks!
> >
> >
> >
> > ----
> > Mark Douglas Corner
> > [EMAIL PROTECTED]
> >
> >
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> >
>
> ----
> Mark Douglas Corner
> [EMAIL PROTECTED]
>
>
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