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-rw-r--r--net/mptcp/subflow.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 53c75b0e5dce..0020d356233d 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -667,9 +667,11 @@ static enum mapping_status get_mapping_status(struct sock *ssk)
if (!mpext->dsn64) {
map_seq = expand_seq(subflow->map_seq, subflow->map_data_len,
mpext->data_seq);
+ subflow->use_64bit_ack = 0;
pr_debug("expanded seq=%llu", subflow->map_seq);
} else {
map_seq = mpext->data_seq;
+ subflow->use_64bit_ack = 1;
}
if (subflow->map_valid) {