On 10/10/10 13:12, Alon Levy wrote:
----- "Anthony Liguori"<anth...@codemonkey.ws> wrote:
How is this different than usb_del? Is it that it detaches it but
does
not delete the device?
yes. There is no usb_attach command because it was harder to write (can't
use the bus.addr since a detached device doesn't have them) and I didn't
need it right now, my device attaches itself based on a external event.
Which points out a problem with this patch: It should better not use
bus.addr. addr isn't fixed and even can be uninitialized. Yes, usb_del
uses it (for historical reasons). But we better should not use it in
new code. Better use the device id (like device_del). Which will work
for usb_attach too.
Next question: What is the use case? attach/detach is used by devices
internally. usb-host does attach/detach when devices get plugged-in and
-out on the host. The ccid device does simliar things on vsclient
connect/disconnect. So toggeling the attach state via monitor easily
could have unwanted side effects ...
cheers,
Gerd
