netdev - [PATCH net-next v2] bonding: warn user when 802.3ad speed is unknown

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Date:   Fri,  9 Jun 2017 17:58:08 +0200
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     andrew@...n.ch
Cc:     netdev@...r.kernel.org, davem@...emloft.net, j.vosburgh@...il.com,
        vfalico@...il.com, andy@...yhouse.net, thibaut.collet@...nd.com,
        linville@...driver.com, Nicolas Dichtel <nicolas.dichtel@...nd.com>
Subject: [PATCH net-next v2] bonding: warn user when 802.3ad speed is unknown

Goal is to advertise the user when ethtool speeds and 802.3ad speeds are
desynchronized.
When this case happens, the kernel needs to be patched.

Suggested-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
---

Here is another proposal. Comments are welcome.

v2: use pr_warn_once()
    warn only when speed != SPEED_UNKNOWN

 drivers/net/bonding/bond_3ad.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index b44a6aeb346d..165a8009c640 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -322,6 +322,11 @@ static u16 __get_link_speed(struct port *port)
 
 		default:
 			/* unknown speed value from ethtool. shouldn't happen */
+			if (slave->speed != SPEED_UNKNOWN)
+				pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n",
+					     slave->bond->dev->name,
+					     slave->speed,
+					     port->actor_port_number);
 			speed = 0;
 			break;
 		}
-- 
2.8.1