Commits on Sep 27, 2024

1. firmware: fix race conditions in control out transfers (-2 bytes XRAM). …

   Before this change, the EP0BUF buffer used by control out transfers
   could be overwritten by new control transfers before the firmware is
   finished processing the previous control transfer.
   
   The easiest way to illustrate this problem would be to run in a
   different terminal the following:
   
   ```bash
   while true; do lsusb -v -d 20b7:9db1 > /dev/null; done
   ```
   
   While this is running, glasglow is completely unusable.
   Presumably even a single lsusb run could cause corruption, if it
   happens to be issued at the wrong time.
   
   With this change glasgow is now usable, even if the above loop is
   running.
   
   Please see whitequark/libfx2#18 for more
   details.

   

   purdeaandrei committed Sep 27, 2024
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