newbie question: usb_kill_urb necessary in disconnect?

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Hi,

Quick question that will save a lot of time slogging through usbcore code if
someone will indulge me.

Is it necessary to kill all outstanding urbs in a driver's disconnect
function?  I've seen documentation saying that the usbcore takes care of this
when the disconnect is detected, suggesting that tracking outstanding urbs and
killing them in the driver's disconnect function is unnecessary.  But I also
see drivers that do just that.  As I understand it, an urb killed by usbcore
will have its callback invoked, with the result code indicating that it was
killed, which the callback can handle gracefully.  Any errors in my
understanding?

Thanks everyone!

Mike

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