Bluetooth: Get rid of cmd_timeout and use the reset callback

The hdev->reset is never used now and the hdev->cmd_timeout actually
does reset. This patch changes the call path from
  hdev->cmd_timeout -> vendor_cmd_timeout -> btusb_reset -> hdev->reset
, to
  hdev->reset -> vendor_reset -> btusb_reset
Which makes it clear when we export the hdev->reset to a wider usage
e.g. allowing reset from sysfs.

This patch doesn't introduce any behavior change.

Signed-off-by: Hsin-chen Chuang <chharry@chromium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

drivers/bluetooth/btmtksdio.c

@@ -1249,7 +1249,7 @@ static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 	return 0;
 }
 
-static void btmtksdio_cmd_timeout(struct hci_dev *hdev)
+static void btmtksdio_reset(struct hci_dev *hdev)
 {
 	struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
 	u32 status;
@@ -1360,7 +1360,7 @@ static int btmtksdio_probe(struct sdio_func *func,
 
 	hdev->open     = btmtksdio_open;
 	hdev->close    = btmtksdio_close;
-	hdev->cmd_timeout = btmtksdio_cmd_timeout;
+	hdev->reset    = btmtksdio_reset;
 	hdev->flush    = btmtksdio_flush;
 	hdev->setup    = btmtksdio_setup;
 	hdev->shutdown = btmtksdio_shutdown;

drivers/bluetooth/btusb.c

@@ -916,7 +916,7 @@ static void btusb_reset(struct hci_dev *hdev)
 	usb_queue_reset_device(data->intf);
 }
 
-static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
+static void btusb_intel_reset(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
 	struct gpio_desc *reset_gpio = data->reset_gpio;
@@ -994,7 +994,7 @@ static inline void btusb_rtl_alloc_devcoredump(struct hci_dev *hdev,
 	}
 }
 
-static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
+static void btusb_rtl_reset(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
 	struct gpio_desc *reset_gpio = data->reset_gpio;
@@ -1038,13 +1038,13 @@ static void btusb_rtl_hw_error(struct hci_dev *hdev, u8 code)
 	btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
 }
 
-static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
+static void btusb_qca_reset(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
 	struct gpio_desc *reset_gpio = data->reset_gpio;
 
 	if (test_bit(BTUSB_HW_SSR_ACTIVE, &data->flags)) {
-		bt_dev_info(hdev, "Ramdump in progress, defer cmd_timeout");
+		bt_dev_info(hdev, "Ramdump in progress, defer reset");
 		return;
 	}
 
@@ -3868,7 +3868,7 @@ static int btusb_probe(struct usb_interface *intf,
 
 		/* Transport specific configuration */
 		hdev->send = btusb_send_frame_intel;
-		hdev->cmd_timeout = btusb_intel_cmd_timeout;
+		hdev->reset = btusb_intel_reset;
 
 		if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
 			btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);
@@ -3888,7 +3888,7 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->setup = btusb_mtk_setup;
 		hdev->shutdown = btusb_mtk_shutdown;
 		hdev->manufacturer = 70;
-		hdev->cmd_timeout = btmtk_reset_sync;
+		hdev->reset = btmtk_reset_sync;
 		hdev->set_bdaddr = btmtk_set_bdaddr;
 		hdev->send = btusb_send_frame_mtk;
 		set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
@@ -3920,7 +3920,7 @@ static int btusb_probe(struct usb_interface *intf,
 		data->setup_on_usb = btusb_setup_qca;
 		hdev->shutdown = btusb_shutdown_qca;
 		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
-		hdev->cmd_timeout = btusb_qca_cmd_timeout;
+		hdev->reset = btusb_qca_reset;
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		btusb_check_needs_reset_resume(intf);
 	}
@@ -3934,7 +3934,7 @@ static int btusb_probe(struct usb_interface *intf,
 		data->setup_on_usb = btusb_setup_qca;
 		hdev->shutdown = btusb_shutdown_qca;
 		hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
-		hdev->cmd_timeout = btusb_qca_cmd_timeout;
+		hdev->reset = btusb_qca_reset;
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		hci_set_msft_opcode(hdev, 0xFD70);
 	}
@@ -3953,7 +3953,7 @@ static int btusb_probe(struct usb_interface *intf,
 		btrtl_set_driver_name(hdev, btusb_driver.name);
 		hdev->setup = btusb_setup_realtek;
 		hdev->shutdown = btrtl_shutdown_realtek;
-		hdev->cmd_timeout = btusb_rtl_cmd_timeout;
+		hdev->reset = btusb_rtl_reset;
 		hdev->hw_error = btusb_rtl_hw_error;
 
 		/* Realtek devices need to set remote wakeup on auto-suspend */

drivers/bluetooth/hci_qca.c

@@ -1650,7 +1650,7 @@ static void qca_hw_error(struct hci_dev *hdev, u8 code)
 	clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
 }
 
-static void qca_cmd_timeout(struct hci_dev *hdev)
+static void qca_reset(struct hci_dev *hdev)
 {
 	struct hci_uart *hu = hci_get_drvdata(hdev);
 	struct qca_data *qca = hu->priv;
@@ -1981,7 +1981,7 @@ static int qca_setup(struct hci_uart *hu)
 		clear_bit(QCA_IBS_DISABLED, &qca->flags);
 		qca_debugfs_init(hdev);
 		hu->hdev->hw_error = qca_hw_error;
-		hu->hdev->cmd_timeout = qca_cmd_timeout;
+		hu->hdev->reset = qca_reset;
 		if (hu->serdev) {
 			if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
 				hu->hdev->wakeup = qca_wakeup;
@@ -2215,7 +2215,7 @@ static int qca_power_off(struct hci_dev *hdev)
 	enum qca_btsoc_type soc_type = qca_soc_type(hu);
 
 	hu->hdev->hw_error = NULL;
-	hu->hdev->cmd_timeout = NULL;
+	hu->hdev->reset = NULL;
 
 	del_timer_sync(&qca->wake_retrans_timer);
 	del_timer_sync(&qca->tx_idle_timer);

include/net/bluetooth/hci_core.h

@@ -633,7 +633,6 @@ struct hci_dev {
 	int (*post_init)(struct hci_dev *hdev);
 	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);

net/bluetooth/hci_core.c

@@ -1456,8 +1456,8 @@ static void hci_cmd_timeout(struct work_struct *work)
 		bt_dev_err(hdev, "command tx timeout");
 	}
 
-	if (hdev->cmd_timeout)
-		hdev->cmd_timeout(hdev);
+	if (hdev->reset)
+		hdev->reset(hdev);
 
 	atomic_set(&hdev->cmd_cnt, 1);
 	queue_work(hdev->workqueue, &hdev->cmd_work);