Merge tag 'asoc-v5.7' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Updates for v5.7

This is a very big update for the core since Morimoto-san has been
rather busy continuing his refactorings to clean up a lot of the cruft
that we have accumilated over the years.  We've also gained several new
drivers, including initial (but still not complete) parts of the Intel
SoundWire support.

 - Lots of refactorings to modernize the code from Morimoto-san.
 - Conversion of SND_SOC_ALL_CODECS to use imply from Geert Uytterhoeven.
 - Continued refactoring and fixing of the Intel support.
 - Soundwire and more advanced clocking support for Realtek RT5682.
 - Support for amlogic GX, Meson 8, Meson 8B and T9015 DAC, Broadcom
   DSL/PON, Ingenic JZ4760 and JZ4770, Realtek RL6231, and TI TAS2563 and
   TLV320ADCX140.

1 files changed, 17 insertions, 2 deletions

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 45acd877bef3..fd2c3150e591 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -334,6 +334,8 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
 	struct mptcp_sock *msk;
 	unsigned int ack_size;
 	bool ret = false;
+	bool can_ack;
+	u64 ack_seq;
 	u8 tcp_fin;
 
 	if (skb) {
@@ -360,9 +362,22 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
 		ret = true;
 	}
 
+	/* passive sockets msk will set the 'can_ack' after accept(), even
+	 * if the first subflow may have the already the remote key handy
+	 */
+	can_ack = true;
 	opts->ext_copy.use_ack = 0;
 	msk = mptcp_sk(subflow->conn);
-	if (!msk || !READ_ONCE(msk->can_ack)) {
+	if (likely(msk && READ_ONCE(msk->can_ack))) {
+		ack_seq = msk->ack_seq;
+	} else if (subflow->can_ack) {
+		mptcp_crypto_key_sha(subflow->remote_key, NULL, &ack_seq);
+		ack_seq++;
+	} else {
+		can_ack = false;
+	}
+
+	if (unlikely(!can_ack)) {
 		*size = ALIGN(dss_size, 4);
 		return ret;
 	}
@@ -375,7 +390,7 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
 
 	dss_size += ack_size;
 
-	opts->ext_copy.data_ack = msk->ack_seq;
+	opts->ext_copy.data_ack = ack_seq;
 	opts->ext_copy.ack64 = 1;
 	opts->ext_copy.use_ack = 1;