> Would you mind to explain how a user of usb_control_msg may
> depend on the sleep being interruptible? Forgets to set a timeout?
You may want to be able to kill a process that waits for a control
message to complete. Especially user processes via devio.c, but
quite possibly also user apps via some kernel driver.
devio.c had its own version of usb_control_msg for that reason,
but it was felt unnecessary and removed.
Tom
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