jerpelea opened a new pull request, #19760:
URL: https://github.com/apache/nuttx/pull/19760
## Summary
cdcuart_txempty() held priv->lock across EP_POLL(), which re-enters the
class through cdcacm_wrcomplete() and takes that same non-recursive lock, and
then took it a second time to read nwrq. Release it after the disconnected
check, matching cdcuart_txready()/cdcuart_rxavailable().
Fixes: cc067ab199bb ("drivers/usbdev/cdcacm.c: Use small lock to protect
cdcacm")
## Impact
RELEASE
## Testing
CI
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