md/r5cache: do r5c_update_log_state after log recovery
We should update log state after we did a log recovery, current completion may get wrong log state since log->log_start wasn't initalized until we called r5l_recovery_log. At log recovery stage, no lock needed as there is no race conditon. next_checkpoint field will be initialized in r5l_recovery_log too. Signed-off-by: NZhengyuan Liu <liuzhengyuan@kylinos.cn> Signed-off-by: NShaohua Li <shli@fb.com>
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