Eric Dumazet [off-list ref] wrote:

On Fri, 2018-01-19 at 14:36 +0100, Florian Westphal wrote:

quoted

diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index b686e2ce9c0e..3723f8f419aa 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c

@@ -432,6 +432,9 @@ static void iscsi_target_sk_data_ready(struct sock *sk)
 	if (test_and_set_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) {
 		write_unlock_bh(&sk->sk_callback_lock);
 		pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1, conn: %p >>>>\n", conn);
+		if (WARN_ON(iscsi_target_sk_data_ready == conn->orig_data_ready))
+			return;

Is this WARN_ON() belonging to this fix ?
At least make it WARN_ON_ONCE() or pr_err_once()

Nicholas, I don't know this code at all so it would be good if you could
give advice here (omit all together, WARN_ON_ONCE, ...).

Thanks!