From: Archie Pusaka <apusaka@xxxxxxxxxxxx>
On cmd_timeout with no reset_gpio, reset the USB port as a last
resort.
This patch changes the behavior of btusb_intel_cmd_timeout and
btusb_rtl_cmd_timeout.
Signed-off-by: Archie Pusaka <apusaka@xxxxxxxxxxxx>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxx>
Reviewed-by: Ying Hsu <yinghsu@xxxxxxxxxxxx>
---
Tested by not cancelling cmd_timer when handing hci event.
Before the patch:
ERR kernel: [ 716.929206] Bluetooth: hci_cmd_timeout() hci0: command 0x0000 tx timeout
ERR kernel: [ 716.929218] Bluetooth: btusb_rtl_cmd_timeout() hci0: No gpio to reset Realtek device, ignoring
After the patch:
ERR kernel: [ 225.270048] Bluetooth: hci_cmd_timeout() hci0: command 0x0000 tx timeout
ERR kernel: [ 225.270060] Bluetooth: btusb_rtl_cmd_timeout() hci0: Resetting usb device.
INFO kernel: [ 225.386613] usb 3-3: reset full-speed USB device number 3 using xhci_hcd
Changes in v3:
* introduce hdev->reset to override the generic reset function
Changes in v2:
* Update commit message
drivers/bluetooth/btusb.c | 35 +++++++++++++++++++++++---------
include/net/bluetooth/hci_core.h | 1 +
2 files changed, 26 insertions(+), 10 deletions(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 271963805a38..e6add3604214 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -696,6 +696,28 @@ struct btusb_data {
unsigned cmd_timeout_cnt;
};
+static void btusb_reset(struct hci_dev *hdev)
+{
+ struct btusb_data *data;
+ int err;
+
+ if (hdev->reset) {
+ hdev->reset(hdev);
+ return;
+ }
+
+ data = hci_get_drvdata(hdev);
+ /* This is not an unbalanced PM reference since the device will reset */
+ err = usb_autopm_get_interface(data->intf);
+ if (err) {
+ bt_dev_err(hdev, "Failed usb_autopm_get_interface: %d", err);
+ return;
+ }
+
+ bt_dev_err(hdev, "Resetting usb device.");
+ usb_queue_reset_device(data->intf);
+}
+
static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
@@ -705,7 +727,7 @@ static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
return;
if (!reset_gpio) {
- bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
+ btusb_reset(hdev);
return;
}
@@ -736,7 +758,7 @@ static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
return;
if (!reset_gpio) {
- bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
+ btusb_reset(hdev);
return;
}
@@ -761,7 +783,6 @@ static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
struct gpio_desc *reset_gpio = data->reset_gpio;
- int err;
if (++data->cmd_timeout_cnt < 5)
return;
@@ -787,13 +808,7 @@ static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
return;
}
- bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
- /* This is not an unbalanced PM reference since the device will reset */
- err = usb_autopm_get_interface(data->intf);
- if (!err)
- usb_queue_reset_device(data->intf);
- else
- bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
+ btusb_reset(hdev);
}
static inline void btusb_free_frags(struct btusb_data *data)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index c54bc71254af..55a40f5606c3 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -659,6 +659,7 @@ struct hci_dev {
int (*set_diag)(struct hci_dev *hdev, bool enable);
int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
void (*cmd_timeout)(struct hci_dev *hdev);
+ void (*reset)(struct hci_dev *hdev);
bool (*wakeup)(struct hci_dev *hdev);
int (*set_quality_report)(struct hci_dev *hdev, bool enable);
int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
--
2.38.0.rc1.362.ged0d419d3c-goog
