diff options
| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-11-28 14:16:55 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-12-15 13:14:57 +0300 |
| commit | 2373699560a754079579b7722b50d1d38de1960e (patch) | |
| tree | 96f7a25ef1181e69e15f135587aa71440f0945f2 /net | |
| parent | b720383ab1cfd584c8c0d9fc7b8cc541ed76dba5 (diff) | |
| download | linux-2373699560a754079579b7722b50d1d38de1960e.tar.xz | |
mac802154: Avoid new associations while disassociating
While disassociating from a PAN ourselves, let's set the maximum number
of associations temporarily to zero to be sure no new device tries to
associate with us.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/linux-wpan/20231128111655.507479-6-miquel.raynal@bootlin.com
Diffstat (limited to 'net')
| -rw-r--r-- | net/ieee802154/pan.c | 8 | ||||
| -rw-r--r-- | net/mac802154/cfg.c | 11 |
2 files changed, 15 insertions, 4 deletions
diff --git a/net/ieee802154/pan.c b/net/ieee802154/pan.c index fb5b0af2ef68..249df7364b3e 100644 --- a/net/ieee802154/pan.c +++ b/net/ieee802154/pan.c @@ -94,10 +94,16 @@ __le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev) } EXPORT_SYMBOL_GPL(cfg802154_get_free_short_addr); -void cfg802154_set_max_associations(struct wpan_dev *wpan_dev, unsigned int max) +unsigned int cfg802154_set_max_associations(struct wpan_dev *wpan_dev, + unsigned int max) { + unsigned int old_max; + lockdep_assert_held(&wpan_dev->association_lock); + old_max = wpan_dev->max_associations; wpan_dev->max_associations = max; + + return old_max; } EXPORT_SYMBOL_GPL(cfg802154_set_max_associations); diff --git a/net/mac802154/cfg.c b/net/mac802154/cfg.c index 17e2032fac24..ef7f23af043f 100644 --- a/net/mac802154/cfg.c +++ b/net/mac802154/cfg.c @@ -389,6 +389,7 @@ static int mac802154_disassociate_from_parent(struct wpan_phy *wpan_phy, struct ieee802154_local *local = wpan_phy_priv(wpan_phy); struct ieee802154_pan_device *child, *tmp; struct ieee802154_sub_if_data *sdata; + unsigned int max_assoc; u64 eaddr; int ret; @@ -397,6 +398,7 @@ static int mac802154_disassociate_from_parent(struct wpan_phy *wpan_phy, /* Start by disassociating all the children and preventing new ones to * attempt associations. */ + max_assoc = cfg802154_set_max_associations(wpan_dev, 0); list_for_each_entry_safe(child, tmp, &wpan_dev->children, node) { ret = mac802154_send_disassociation_notif(sdata, child, IEEE802154_COORD_WISHES_DEVICE_TO_LEAVE); @@ -429,14 +431,17 @@ static int mac802154_disassociate_from_parent(struct wpan_phy *wpan_phy, if (local->hw.flags & IEEE802154_HW_AFILT) { ret = drv_set_pan_id(local, wpan_dev->pan_id); if (ret < 0) - return ret; + goto reset_mac_assoc; ret = drv_set_short_addr(local, wpan_dev->short_addr); if (ret < 0) - return ret; + goto reset_mac_assoc; } - return 0; +reset_mac_assoc: + cfg802154_set_max_associations(wpan_dev, max_assoc); + + return ret; } static int mac802154_disassociate_child(struct wpan_phy *wpan_phy, |