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netpoll: allocate netdev tracker right away

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Commit 5fa5ae6058 ("netpoll: add net device refcount tracker to struct netpoll")
was part of one of the initial netdev tracker introduction patches.
It added an explicit netdev_tracker_alloc() for netpoll, presumably
because the flow of the function is somewhat odd.
After most of the core networking stack was converted to use
the tracking hold() variants, netpoll's call to old dev_hold()
stands out a bit.

np is allocated by the caller and ready to use, we can use
netdev_hold() here, even tho np->ndev will only be set to
ndev inside __netpoll_setup().

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2023-06-12 14:49:44 -07:00 committed by David S. Miller
parent 70f7457ad6
commit 48eed027d3
1 changed files with 2 additions and 3 deletions
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5
net/core/netpoll.c
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@ -690,7 +690,7 @@ int netpoll_setup(struct netpoll *np)
err = -ENODEV;
goto unlock;
}
dev_hold(ndev);
netdev_hold(ndev, &np->dev_tracker, GFP_KERNEL);
if (netdev_master_upper_dev_get(ndev)) {
np_err(np, "%s is a slave device, aborting\n", np->dev_name);
@ -783,12 +783,11 @@ put_noaddr:
err = __netpoll_setup(np, ndev);
if (err)
goto put;
netdev_tracker_alloc(ndev, &np->dev_tracker, GFP_KERNEL);
rtnl_unlock();
return 0;
put:
dev_put(ndev);
netdev_put(ndev, &np->dev_tracker);
unlock:
rtnl_unlock();
return err;