linux-kernel - [PATCH 2/3] Bluetooth: btusb: Load firmware exclusively for Intel BT

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Date:   Wed,  3 Oct 2018 15:15:11 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] Bluetooth: btusb: Load firmware exclusively for Intel BT

To avoid the firmware loading race between Bluetooth and WiFi on Intel
8260, load firmware exclusively when IWLWIFI is enabled.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/bluetooth/btusb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 61cde1a7ec1b..060e3c6482f4 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2251,8 +2251,16 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 
 	set_bit(BTUSB_DOWNLOADING, &data->flags);
 
+#if IS_ENABLED(CONFIG_IWLWIFI)
+	btintel_firmware_lock();
+#endif
+
 	/* Start firmware downloading and get boot parameter */
 	err = btintel_download_firmware(hdev, fw, &boot_param);
+
+#if IS_ENABLED(CONFIG_IWLWIFI)
+	btintel_firmware_unlock();
+#endif
 	if (err < 0)
 		goto done;
 
-- 
2.17.1