netdev - [PATCH net-next 1/2] net-sysfs: update the queue counts in the unregistration path

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Message-Id: <20211207145725.352657-2-atenart@kernel.org>
Date:   Tue,  7 Dec 2021 15:57:24 +0100
From:   Antoine Tenart <atenart@...nel.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Antoine Tenart <atenart@...nel.org>, alexander.duyck@...il.com,
        netdev@...r.kernel.org
Subject: [PATCH net-next 1/2] net-sysfs: update the queue counts in the unregistration path

When updating Rx and Tx queue kobjects, the queue count should always be
updated to match the queue kobjects count. This was not done in the net
device unregistration path, fix it. Tracking all queue count updates
will allow in a following up patch to detect illegal updates.

Signed-off-by: Antoine Tenart <atenart@...nel.org>
---
 net/core/net-sysfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 3b2cdbbdc858..33f408c24205 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1808,6 +1808,9 @@ static void remove_queue_kobjects(struct net_device *dev)
 
 	net_rx_queue_update_kobjects(dev, real_rx, 0);
 	netdev_queue_update_kobjects(dev, real_tx, 0);
+
+	dev->real_num_rx_queues = 0;
+	dev->real_num_tx_queues = 0;
 #ifdef CONFIG_SYSFS
 	kset_unregister(dev->queues_kset);
 #endif
-- 
2.33.1