> Unfortunately it's still not enough to prevent deadlocks.
> The host controller drivers allocate memory, too.

Wasn't the right fix for this to pass GFP/SLAB flag bits
into the usb_submit_urb() and the usb_bus.submit_urb?


> Basically the submit_urb() codepath must use only GFP_ATOMIC.
> I am not sure about urb unlinking. 

I think unlink wasn't expected to involve memory allocations.

- Dave



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