If we released the 'stripe_head' in r5c_recovery_flush_log,
ctx->cached_list will both release the data-parity stripes and
data-only stripes, which will become empty.
And we also need to use the data-only stripes in
r5c_recovery_rewrite_data_only_stripes, so we should wait util rewrite
data-only stripes is done before releasing them.
Reviewed-by: NZhengyuan Liu <liuzhengyuan@kylinos.cn>
Reviewed-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NJackieLiu <liuyun01@kylinos.cn>
Signed-off-by: NShaohua Li <shli@fb.com>