redonkable/alistair23-linux
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Bluetooth: mgmt: Fix dev_class related command response timing

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All mgmt commands that may fire off a hci_write_class_of_device command
should wait for the completion of the HCI command before sending a
response to user space.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2012-02-23 23:09:40 +02:00
parent c95f0ba76f
commit 90e704543d
1 changed files with 65 additions and 5 deletions
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70
net/bluetooth/mgmt.c
View file

@ -1332,6 +1332,7 @@ failed:
static int add_uuid(struct sock *sk, u16 index, void *data, u16 len)
{
struct mgmt_cp_add_uuid *cp = data;
struct pending_cmd *cmd;
struct hci_dev *hdev;
struct bt_uuid *uuid;
int err;
@ -1374,7 +1375,17 @@ static int add_uuid(struct sock *sk, u16 index, void *data, u16 len)
if (err < 0)
goto failed;
err = cmd_complete(sk, index, MGMT_OP_ADD_UUID, 0, hdev->dev_class, 3);
if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
err = cmd_complete(sk, index, MGMT_OP_ADD_UUID, 0,
hdev->dev_class, 3);
goto failed;
}
cmd = mgmt_pending_add(sk, MGMT_OP_ADD_UUID, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto failed;
}
failed:
hci_dev_unlock(hdev);
@ -1386,6 +1397,7 @@ failed:
static int remove_uuid(struct sock *sk, u16 index, void *data, u16 len)
{
struct mgmt_cp_remove_uuid *cp = data;
struct pending_cmd *cmd;
struct list_head *p, *n;
struct hci_dev *hdev;
u8 bt_uuid_any[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
@ -1448,8 +1460,17 @@ update_class:
if (err < 0)
goto unlock;
err = cmd_complete(sk, index, MGMT_OP_REMOVE_UUID, 0,
if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
err = cmd_complete(sk, index, MGMT_OP_REMOVE_UUID, 0,
hdev->dev_class, 3);
goto unlock;
}
cmd = mgmt_pending_add(sk, MGMT_OP_REMOVE_UUID, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto unlock;
}
unlock:
hci_dev_unlock(hdev);
@ -1462,6 +1483,7 @@ static int set_dev_class(struct sock *sk, u16 index, void *data, u16 len)
{
struct hci_dev *hdev;
struct mgmt_cp_set_dev_class *cp = data;
struct pending_cmd *cmd;
int err;
BT_DBG("request for hci%u", index);
@ -1500,10 +1522,20 @@ static int set_dev_class(struct sock *sk, u16 index, void *data, u16 len)
}
err = update_class(hdev);
if (err < 0)
goto unlock;
if (err == 0)
if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
err = cmd_complete(sk, index, MGMT_OP_SET_DEV_CLASS, 0,
hdev->dev_class, 3);
goto unlock;
}
cmd = mgmt_pending_add(sk, MGMT_OP_SET_DEV_CLASS, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto unlock;
}
unlock:
hci_dev_unlock(hdev);
@ -3110,6 +3142,7 @@ int mgmt_index_removed(struct hci_dev *hdev)
struct cmd_lookup {
struct sock *sk;
struct hci_dev *hdev;
u8 mgmt_status;
};
static void settings_rsp(struct pending_cmd *cmd, void *data)
@ -3632,14 +3665,41 @@ int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status)
return err;
}
static void class_rsp(struct pending_cmd *cmd, void *data)
{
struct cmd_lookup *match = data;
cmd_complete(cmd->sk, cmd->index, cmd->opcode, match->mgmt_status,
match->hdev->dev_class, 3);
list_del(&cmd->list);
if (match->sk == NULL) {
match->sk = cmd->sk;
sock_hold(match->sk);
}
mgmt_pending_free(cmd);
}
int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
u8 status)
{
int err;
struct cmd_lookup match = { NULL, hdev, mgmt_status(status) };
int err = 0;
clear_bit(HCI_PENDING_CLASS, &hdev->dev_flags);
err = mgmt_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, dev_class, 3, NULL);
mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, class_rsp, &match);
mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, class_rsp, &match);
mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, class_rsp, &match);
if (!status)
err = mgmt_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev,
dev_class, 3, NULL);
if (match.sk)
sock_put(match.sk);
return err;
}