tree 3167d73a523249abe2bc1c62e8bc542a97ca4ee6
parent 61394cde291ac98c1a20d2a31786d5bc1c1ef097
author Harald Welte <laforge@osmocom.org> 1668621111 +0100
committer laforge <laforge@osmocom.org> 1668848543 +0000

firmware/sniffer: Handle WT timeouts via ring-buffer

Before this patch, all UART characters went through a fifo/ringbuffer
of depth 512, while events like timeout were delivered directly via
a global flags variable from ISR to main code.  This means that one or
more correct/complete TPDUs could theoretically still be in the FIFO,
but the "Fast path" of the timeout handling is pre-empting that and
messing with the state machines.

All events from the UART should be delivered via the ring-buffer to make
sure they arrive in order at the main function.

The old "report timeout via change flags in separate USB message" code
is left in place.  On the USB protocol we should keep it for
compatibility.  Internally we should probably also migrate that over
to the new ring-buffer method in a second step.

Change-Id: I4434c6fcd59d1a425e9ded734bbc8b0411a0a0d8