diff mbox series

[v3] Bluetooth: btusb: Introduce generic USB reset

Message ID 20221006170915.v3.1.I46e98b47be875d0b9abff2d19417c612077d1909@changeid (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series [v3] Bluetooth: btusb: Introduce generic USB reset | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Archie Pusaka Oct. 6, 2022, 9:09 a.m. UTC 
From: Archie Pusaka <apusaka@chromium.org>

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@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@google.com>
Reviewed-by: Ying Hsu <yinghsu@chromium.org>

---
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(-)

Comments

patchwork-bot+bluetooth@kernel.org Oct. 7, 2022, 7:40 p.m. UTC | #1 
Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Thu,  6 Oct 2022 17:09:31 +0800 you wrote:
> From: Archie Pusaka <apusaka@chromium.org>
> 
> 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.
> 
> [...]

Here is the summary with links:
  - [v3] Bluetooth: btusb: Introduce generic USB reset
    https://git.kernel.org/bluetooth/bluetooth-next/c/b9c747ff82b4

You are awesome, thank you!
diff mbox series

Patch

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);