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MHEG: Fix race condition when restarting the DSMCC after a channel ch…
…ange When a channel change occurs, the DSMCC file cache must be emptied so that a consistent filesystem is rebuilt from the new carousel. MHIContext::Restart, which flushes the cache, is called from TV::ITVRestartv when the channel or card is changed, However, the ringbuffer continues to deliver packets from the old stream for a short period after the change. This can produce an invalid file structure which can result in missing text pages or a failure to start the MHEG app. This change clears the filesystem cache when a NetBootInfo descriptor is presented in the PMT, which only occurs after the new stream has started. Signed-off-by: Lawrence Rust <email@example.com> Signed-off-by: Stuart Morgan <firstname.lastname@example.org>
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