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device: use empty string as drvname when devicetree label is absent

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As we move to making the `label` property optional, we need to account
for widespread use of `dev->name` in contexts where the pointer is not
validated before it is dereferenced.  Use an empty string instead of a
null pointer when no label is provided.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2021-02-12 08:04:09 -06:00 • committed by Kumar Gala
commit 28897df295
3 changed files with 3 additions and 3 deletions
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include/net/net_if.h
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@ -2269,7 +2269,7 @@ struct net_if_api {
#define NET_DEVICE_DT_DEFINE(node_id, init_fn, pm_control_fn, data, cfg, \
prio, api, l2, l2_ctx_type, mtu) \
Z_NET_DEVICE_INIT(node_id, Z_DEVICE_DT_DEV_NAME(node_id), \
DT_PROP_OR(node_id, label, NULL), init_fn, \
DT_PROP_OR(node_id, label, ""), init_fn, \
pm_control_fn, data, cfg, prio, api, l2, \
l2_ctx_type, mtu)