linux-kernel - [PATCH v2] net/ncsi: clear Tx enable mode when handling a Config required AEN

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Date:   Wed, 26 Apr 2023 16:13:50 +0800
From:   Cosmo Chou <chou.cosmo@...il.com>
To:     kuba@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        pabeni@...hat.com, sam@...dozajonas.com
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        chou.cosmo@...il.com, cosmo.chou@...ntatw.com
Subject: [PATCH v2] net/ncsi: clear Tx enable mode when handling a Config required AEN

ncsi_channel_is_tx() determines whether a given channel should be
used for Tx or not. However, when reconfiguring the channel by
handling a Configuration Required AEN, there is a misjudgment that
the channel Tx has already been enabled, which results in the Enable
Channel Network Tx command not being sent.

Clear the channel Tx enable flag before reconfiguring the channel to
avoid the misjudgment.

Fixes: 8d951a75d022 ("net/ncsi: Configure multi-package, multi-channel modes with failover")
Signed-off-by: Cosmo Chou <chou.cosmo@...il.com>
---
 net/ncsi/ncsi-aen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c
index b635c194f0a8..62fb1031763d 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -165,6 +165,7 @@ static int ncsi_aen_handler_cr(struct ncsi_dev_priv *ndp,
 	nc->state = NCSI_CHANNEL_INACTIVE;
 	list_add_tail_rcu(&nc->link, &ndp->channel_queue);
 	spin_unlock_irqrestore(&ndp->lock, flags);
+	nc->modes[NCSI_MODE_TX_ENABLE].enable = 0;
 
 	return ncsi_process_next_channel(ndp);
 }
-- 
2.34.1