Merge tag 'irqchip-fixes-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgentirq-urgent-2020-08-30

Pull irqchip fixes from Marc Zyngier:

 - Revert the wholesale conversion to platform drivers of the pdc, sysirq
   and cirq drivers, as it breaks a number of platforms even when the
   driver is built-in (probe ordering bites you).

 - Prevent interrupt from being lost with the STM32 exti driver

 - Fix wake-up interrupts for the MIPS Ingenic driver

 - Fix an embarassing typo in the new module helpers, leading to the probe
   failing most of the time

 - The promised TI firmware rework that couldn't make it into the merge
   window due to a very badly managed set of dependencies

1 files changed, 23 insertions, 0 deletions

diff --git a/net/ipv4/tcp_fastopen.c b/net/ipv4/tcp_fastopen.c
index c1a54f3d58f5..09b62de04eea 100644
--- a/net/ipv4/tcp_fastopen.c
+++ b/net/ipv4/tcp_fastopen.c
@@ -108,6 +108,29 @@ out:
 	return err;
 }
 
+int tcp_fastopen_get_cipher(struct net *net, struct inet_connection_sock *icsk,
+			    u64 *key)
+{
+	struct tcp_fastopen_context *ctx;
+	int n_keys = 0, i;
+
+	rcu_read_lock();
+	if (icsk)
+		ctx = rcu_dereference(icsk->icsk_accept_queue.fastopenq.ctx);
+	else
+		ctx = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
+	if (ctx) {
+		n_keys = tcp_fastopen_context_len(ctx);
+		for (i = 0; i < n_keys; i++) {
+			put_unaligned_le64(ctx->key[i].key[0], key + (i * 2));
+			put_unaligned_le64(ctx->key[i].key[1], key + (i * 2) + 1);
+		}
+	}
+	rcu_read_unlock();
+
+	return n_keys;
+}
+
 static bool __tcp_fastopen_cookie_gen_cipher(struct request_sock *req,
 					     struct sk_buff *syn,
 					     const siphash_key_t *key,