jerpelea opened a new pull request, #19670: URL: https://github.com/apache/nuttx/pull/19670
## Summary The USB device controller drivers invoke CLASS_DISCONNECT() on every USB bus reset, and a bus reset is the first step of normal host enumeration. Every other class driver (cdcacm, usbmsc, rndis) re-asserts DEV_CONNECT() at the end of its disconnect() handler so that the device remains attached; cdcecm and cdcncm did not, so on controllers that soft-disconnect around bus reset (e.g. rp2040, which drops the pull-up in its bus-reset handler) a standalone CDC-ECM or CDC-NCM device is left soft-disconnected by the first bus reset and never enumerates on the host. Mirror the cdcacm behavior and perform the soft connect in the disconnect() methods, unless part of a composite device (composite.c already re-connects in its own disconnect handler). Fixes the standalone CDC-ECM case of issue #15880. Validated on raspberrypi-pico (RP2040): with this change a standalone CONFIG_NET_CDCECM device that previously never appeared on the host enumerates via cdc_ether and pings with 0% loss. cdcncm has the identical defect and receives the identical fix. ## Impact RELEASE ## Testing CI -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
