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Hoernchen has posted comments on this change by lynxis lazus. ( https://gerrit.osmocom.org/c/osmo-ccid-firmware/+/42619?usp=email )

Change subject: octsim: usb_descriptor: reduce IRQ endpoint max packet size to 4 bytes ......................................................................

Patch Set 1:

(1 comment)

Patchset:

PS1:

As I understand the IRQs on USB, the EP size is relevant for scheduling the bus and the bus will res […]

If you're worried about scheduling set bInterval to the recommended value by the ccid spec, which is 255 - it's sim card presence after all, not something that changes rapidly...