Jakub Kicinski says:
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net: create device lookup API with reference tracking
We still see dev_hold() / dev_put() calls without reference tracker
getting added in new code. dev_get_by_name() / dev_get_by_index()
seem to be one of the sources of those. Provide appropriate helpers.
Allocating the tracker can obviously be done with an additional call
to netdev_tracker_alloc(), but a single API feels cleaner.
v2:
- fix a dev_put() in ethtool
v1: https://lore.kernel.org/all/
20230609183207.
1466075-1-kuba@kernel.org/
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Signed-off-by: David S. Miller <davem@davemloft.net>