Hello all,
I’m writing a USB device driver. I’m having problems calling the lower driver to do a read/write. I build the urb using UsbBuildInterruptOrBulkTransferRequest and submit it to the lower driver using IoCallDriver. I set the completion routine using IoSetCompletionRoutine before sending. After calling IoCallDriver, the status returned was Status Pending. However, the Completion Routine set was never called and the program would just stall.I don’t know what’s wrong and hope that someone can shed some light to this.
Thanks…
regards,
Marilyn
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