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Bluetooth: Convert IRK list to RCU

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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>
This commit is contained in:
Johan Hedberg
2014-11-13 14:37:48 +02:00
committed by Marcel Holtmann
parent 970d0f1b28
commit adae20cb2d
3 changed files with 38 additions and 29 deletions
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10
net/bluetooth/smp.c
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@ -393,8 +393,8 @@ static void smp_chan_destroy(struct l2cap_conn *conn)
}
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 @@ static void smp_notify_keys(struct l2cap_conn *conn)
* 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 @@ int smp_register(struct hci_dev *hdev)
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");