Bluetooth: Convert IRK list to RCU
This patch set converts the hdev->identity_resolving_keys list to use
RCU to eliminate the need to use hci_dev_lock/unlock.
An additional change that must be done is to remove use of
CRYPTO_ALG_ASYNC for the hdev-specific AES crypto context. The reason is
that this context is used for matching RPAs and the loop that does the
matching is under the RCU read lock, i.e. is an atomic section which
cannot sleep.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index fd2dfe5..7b610f6 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -393,8 +393,8 @@
}
if (smp->remote_irk) {
- list_del(&smp->remote_irk->list);
- kfree(smp->remote_irk);
+ list_del_rcu(&smp->remote_irk->list);
+ kfree_rcu(smp->remote_irk, rcu);
}
}
@@ -655,8 +655,8 @@
* just remove it.
*/
if (!bacmp(&smp->remote_irk->rpa, BDADDR_ANY)) {
- list_del(&smp->remote_irk->list);
- kfree(smp->remote_irk);
+ list_del_rcu(&smp->remote_irk->list);
+ kfree_rcu(smp->remote_irk, rcu);
smp->remote_irk = NULL;
}
}
@@ -1696,7 +1696,7 @@
BT_DBG("%s", hdev->name);
- tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0, CRYPTO_ALG_ASYNC);
+ tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0, 0);
if (IS_ERR(tfm_aes)) {
int err = PTR_ERR(tfm_aes);
BT_ERR("Unable to create crypto context");