tools: bpftool: return from do_event_pipe() on bad arguments
When command line parsing fails in the while loop in do_event_pipe() because the number of arguments is incorrect or because the keyword is unknown, an error message is displayed, but bpftool remains stuck in the loop. Make sure we exit the loop upon failure. Fixes: f412eed9 ("tools: bpftool: add simple perf event output reader") Signed-off-by: NQuentin Monnet <quentin.monnet@netronome.com> Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
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