When receiving a HCI Hardware Error event, the controller should be
assumed to be non-functional until issuing a HCI Reset command.
The Bluetooth hardware errors are vendor specific and so add a
new hdev->hw_error callback that drivers can provide to run extra
code to handle the hardware error.
After completing the vendor specific error handling perform a full
reset of the Bluetooth stack by closing and re-opening the transport.
Based-on-patch-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 3 +++
net/bluetooth/hci_core.c | 21 +++++++++++++++++++++
net/bluetooth/hci_event.c | 4 +++-
3 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0f5e59f1e3cb..1780f1681ecf 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -232,6 +232,7 @@ struct hci_dev {
__u16 conn_info_min_age;
__u16 conn_info_max_age;
__u8 ssp_debug_mode;
+ __u8 hw_error_code;
__u32 clock;
__u16 devid_source;
@@ -293,6 +294,7 @@ struct hci_dev {
struct work_struct power_on;
struct delayed_work power_off;
+ struct work_struct error_reset;
__u16 discov_timeout;
struct delayed_work discov_off;
@@ -369,6 +371,7 @@ struct hci_dev {
int (*setup)(struct hci_dev *hdev);
int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
void (*notify)(struct hci_dev *hdev, unsigned int evt);
+ void (*hw_error)(struct hci_dev *hdev, u8 code);
int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
};
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 46aa702c189d..0f98d9057ae7 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2140,6 +2140,26 @@ static void hci_power_off(struct work_struct *work)
smp_unregister(hdev);
}
+static void hci_error_reset(struct work_struct *work)
+{
+ struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
+
+ BT_DBG("%s", hdev->name);
+
+ if (hdev->hw_error)
+ hdev->hw_error(hdev, hdev->hw_error_code);
+ else
+ BT_ERR("%s hardware error 0x%2.2x", hdev->name,
+ hdev->hw_error_code);
+
+ if (hci_dev_do_close(hdev))
+ return;
+
+ smp_unregister(hdev);
+
+ hci_dev_do_open(hdev);
+}
+
static void hci_discov_off(struct work_struct *work)
{
struct hci_dev *hdev;
@@ -2932,6 +2952,7 @@ struct hci_dev *hci_alloc_dev(void)
INIT_WORK(&hdev->cmd_work, hci_cmd_work);
INIT_WORK(&hdev->tx_work, hci_tx_work);
INIT_WORK(&hdev->power_on, hci_power_on);
+ INIT_WORK(&hdev->error_reset, hci_error_reset);
INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 4175470ff48e..a72a5f50728d 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3100,7 +3100,9 @@ static void hci_hardware_error_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_hardware_error *ev = (void *) skb->data;
- BT_ERR("%s hardware error 0x%2.2x", hdev->name, ev->code);
+ hdev->hw_error_code = ev->code;
+
+ queue_work(hdev->req_workqueue, &hdev->error_reset);
}
static void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
