Alan Stern wrote:
I didn't go through the details of the firmware transfer, but everything
else looked correct. It's not obvious why the device doesn't respond to
your program.
I just found the problem.
I upgraded to amd64 and my driver didn't work at all. Kernel panic
("PCI-DMA: high address but no IOMMU") during the first firmware packet
transfer.
Turns out you can't just use the data part of the firmware struct in
usb_control_msg context, you have to copy it to a GFP_ATOMIC buffer. Oops!
After fixing that, I get an interrupt at the point when it is expected.
You hereby have permission to slap me silly :)
Daniel
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