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llc: avoid blocking in llc_sap_close()

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llc_sap_close() is called by llc_sap_put() which
could be called in BH context in llc_rcv(). We can't
block in BH.

There is no reason to block it here, kfree_rcu() should
be sufficient.

Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Cong Wang 2018-09-11 11:42:06 -07:00 • committed by David S. Miller
commit 9708d2b5b7
2 changed files with 2 additions and 3 deletions
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4
net/llc/llc_core.c
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@ -127,9 +127,7 @@ void llc_sap_close(struct llc_sap *sap)
list_del_rcu(&sap->node);
spin_unlock_bh(&llc_sap_list_lock);
synchronize_rcu();
kfree(sap);
kfree_rcu(sap, rcu);
}
static struct packet_type llc_packet_type __read_mostly = {