linux-kernel - [PATCH 2/2] Bluetooth: Set HCI_QUIRK_WAIT_FOR_MATCHING

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Date:   Tue, 23 Apr 2019 15:22:36 +0800
From:   "João Paulo Rechi Vita" <jprvita@...il.com>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>
Cc:     bgodavar@...eaurora.org, ytkim@....qualcomm.com,
        "David S . Miller" <davem@...emloft.net>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...lessm.com,
        João Paulo Rechi Vita <jprvita@...lessm.com>
Subject: [PATCH 2/2] Bluetooth: Set HCI_QUIRK_WAIT_FOR_MATCHING_CC for QCA9377

The QCA9377 devices send an extra command complete for the
LE_SET_RANDOM_ADDR when trying to start an active scanning procedure. It
has to be ignored to avoid confusing the kernel into thinking a passive
scanning procedure is being performed instead, which makes impossible to
discover BTLE devices since no device found events are generated for
passive scanning.

Signed-off-by: João Paulo Rechi Vita <jprvita@...lessm.com>
---
 drivers/bluetooth/btusb.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index ded198328f21..650ba4b7908a 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -70,6 +70,7 @@ static struct usb_driver btusb_driver;
 #define BTUSB_BCM2045		0x40000
 #define BTUSB_IFNUM_2		0x80000
 #define BTUSB_CW6622		0x100000
+#define BTUSB_QCA9377		0x200000
 
 static const struct usb_device_id btusb_table[] = {
 	/* Generic Bluetooth USB device */
@@ -394,6 +395,10 @@ static const struct usb_device_id blacklist_table[] = {
 	/* Silicon Wave based devices */
 	{ USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
 
+	/* QCA9377 devices */
+	{ USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA9377 },
+	{ USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA9377 },
+
 	{ }	/* Terminating entry */
 };
 
@@ -3196,6 +3201,10 @@ static int btusb_probe(struct usb_interface *intf,
 		btusb_check_needs_reset_resume(intf);
 	}
 
+	if (id->driver_info & BTUSB_QCA9377) {
+		set_bit(HCI_QUIRK_WAIT_FOR_MATCHING_CC, &hdev->quirks);
+	}
+
 #ifdef CONFIG_BT_HCIBTUSB_RTL
 	if (id->driver_info & BTUSB_REALTEK) {
 		hdev->setup = btrtl_setup_realtek;
-- 
2.20.1