[PATCH stable 4.19 0/4] tcp: fix the timeout value calculated by tcp_model_timeout() is not accurate

This patch series is present in v5.15 and fixes the problem that the
timeout value calculated by tcp_model_timeout() is not accurate.

Pseudo-Shortlog of commits:

Eric Dumazet [off-list ref]
    tcp: address problems caused by EDT misshaps

Yuchung Cheng [off-list ref]
    tcp: always set retrans_stamp on recovery

Yuchung Cheng [off-list ref]
    tcp: create a helper to model exponential backoff

Eric Dumazet [off-list ref]
    tcp: adjust rto_base in retransmits_timed_out()

 net/ipv4/tcp_input.c  | 16 ++++++-----
 net/ipv4/tcp_output.c |  9 +++----
 net/ipv4/tcp_timer.c  | 63 ++++++++++++++++++++-----------------------
 3 files changed, 43 insertions(+), 45 deletions(-)

-- 
2.19.1