From 2043a14fb3de9d88440b21590f714306fcbbd55f Mon Sep 17 00:00:00 2001
From: David Ahern <dsahern@kernel.org>
Date: Wed, 10 Jul 2024 13:33:10 -0700
Subject: [PATCH] RDMA: Fix netdev tracker in ib_device_set_netdev
If a netdev has already been assigned, ib_device_set_netdev needs to
release the reference on the older netdev but it is mistakenly being
called for the new netdev. Fix it and in the process use netdev_put
to be symmetrical with the netdev_hold.
Fixes: 09f530f0c6d6 ("RDMA: Add netdevice_tracker to ib_device_set_netdev()")
Signed-off-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240710203310.19317-1-dsahern@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
---
drivers/infiniband/core/device.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 7b418c717f296..0290aca18d261 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2184,16 +2184,12 @@ int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
return 0;
}
- if (old_ndev)
- netdev_tracker_free(ndev, &pdata->netdev_tracker);
- if (ndev)
- netdev_hold(ndev, &pdata->netdev_tracker, GFP_ATOMIC);
rcu_assign_pointer(pdata->netdev, ndev);
+ netdev_put(old_ndev, &pdata->netdev_tracker);
+ netdev_hold(ndev, &pdata->netdev_tracker, GFP_ATOMIC);
spin_unlock_irqrestore(&pdata->netdev_lock, flags);
add_ndev_hash(pdata);
- __dev_put(old_ndev);
-
return 0;
}
EXPORT_SYMBOL(ib_device_set_netdev);