From: Paolo Abeni Date: Mon, 21 Jun 2021 22:54:35 +0000 (-0700) Subject: mptcp: don't clear MPTCP_DATA_READY in sk_wait_event() X-Git-Tag: v5.15~843^2~68^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3c90e377a1e87a35a7f868ed1c53ea4d62379a8d;p=platform%2Fkernel%2Flinux-starfive.git mptcp: don't clear MPTCP_DATA_READY in sk_wait_event() If we don't flush entirely the receive queue, we need set again such bit later. We can simply avoid clearing it. Signed-off-by: Paolo Abeni Signed-off-by: Mat Martineau Signed-off-by: David S. Miller --- diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index c47ce07..3e088e9 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1715,7 +1715,7 @@ static void mptcp_wait_data(struct sock *sk, long *timeo) sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); sk_wait_event(sk, timeo, - test_and_clear_bit(MPTCP_DATA_READY, &msk->flags), &wait); + test_bit(MPTCP_DATA_READY, &msk->flags), &wait); sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); remove_wait_queue(sk_sleep(sk), &wait); @@ -2039,10 +2039,8 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, */ if (unlikely(__mptcp_move_skbs(msk))) set_bit(MPTCP_DATA_READY, &msk->flags); - } else if (unlikely(!test_bit(MPTCP_DATA_READY, &msk->flags))) { - /* data to read but mptcp_wait_data() cleared DATA_READY */ - set_bit(MPTCP_DATA_READY, &msk->flags); } + out_err: if (cmsg_flags && copied >= 0) { if (cmsg_flags & MPTCP_CMSG_TS)