fix endflash write would-block error

[esarver]

No description provided.

[github-actions]

Package	Line Rate	Health
kic-visa/src/process.rs	0%	❌
kic-lib/src/interface/connection_addr.rs	57%	✔
kic-lib/src/instrument/mod.rs	0%	❌
kic-lib/src/instrument/authenticate.rs	17%	❌
instrument-repl/src/state_machine.rs	61%	✔
kic-discover/src/ethernet/mod.rs	0%	❌
kic-lib/src/instrument/language.rs	25%	❌
kic-visa/src/main.rs	0%	❌
kic-lib/src/model/ki2600.rs	92%	✔
kic-lib/src/protocol/raw.rs	67%	✔
kic-lib/src/model/versatest.rs	78%	✔
kic-lib/src/instrument/script.rs	100%	✔
kic-discover-visa/src/lib.rs	0%	❌
instrument-repl/src/resources/mod.rs	100%	✔
instrument-repl/src/repl.rs	0%	❌
kic-lib/src/protocol/mod.rs	35%	➖
kic-lib/src/protocol/visa.rs	0%	❌
kic/src/main.rs	0%	❌
kic-discover-visa/src/instrument_discovery/mod.rs	0%	❌
instrument-repl/src/instrument.rs	85%	✔
kic-discover/src/main.rs	0%	❌
kic-discover-visa/src/ethernet/mod.rs	0%	❌
kic-lib/src/protocol/stb.rs	31%	➖
kic-lib/src/instrument/abort.rs	0%	❌
kic-lib/src/interface/mod.rs	0%	❌
kic/src/process.rs	0%	❌
kic-lib/src/instrument/reset.rs	0%	❌
kic-discover-visa/src/visa.rs	0%	❌
kic-lib/src/instrument/login.rs	0%	❌
kic-discover/src/process.rs	0%	❌
kic-discover-visa/src/main.rs	0%	❌
kic-lib/src/model/ki3700.rs	93%	✔
kic-lib/src/model/tti.rs	91%	✔
instrument-repl/src/tsp_error.rs	0%	❌
kic-discover/src/lib.rs	0%	❌
kic-lib/src/model/mod.rs	20%	❌
kic-lib/src/interface/async_stream.rs	0%	❌
kic-discover/src/instrument_discovery/mod.rs	0%	❌
kic-lib/src/instrument/info.rs	55%	✔
Summary	44% (3579 / 8067)	➖