+ urb->status = 0;
+ urb->dev = zd->usb;
+ if(usb_submit_urb(urb, GFP_ATOMIC))
+ free = 1;
Aren't you missing a wake_up in the error case?
+ unsigned int gfp_mask = wait ? GFP_KERNEL : GFP_ATOMIC;
GFP_NOIO please. You might run nfs over the link.
Regards
Oliver
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