Return-Path: Message-Id: <9ef8be4ef80c38b693e5755c738a88de9c907944.1514143015.git.lukas@wunner.de> In-Reply-To: <5e3106d673c3c41bf92c91f1f43bf30682511366.1514143015.git.lukas@wunner.de> References: <5e3106d673c3c41bf92c91f1f43bf30682511366.1514143015.git.lukas@wunner.de> From: Lukas Wunner Date: Tue, 26 Dec 2017 17:07:34 +0200 Subject: [PATCH 3/3] Bluetooth: Avoid WARN splat due to missing GPIOLIB To: Marcel Holtmann , Johan Hedberg Cc: Mika Westerberg , Andy Shevchenko , Frederic Danis , Loic Poulain , Hans de Goede , Max Shavrick , Leif Liddy , Daniel Roschka , Ronald Tschalaer , "Peter Y. Chuang" , linux-bluetooth@vger.kernel.org List-ID: Loading hci_bcm with CONFIG_GPIOLIB=n results in the following splat when calling gpiod_to_irq() from bcm_get_resources(): WARNING: CPU: 0 PID: 1006 at ./include/linux/gpio/consumer.h:450 bcm_get_resources+0x50/0x80 CPU: 0 PID: 1006 Comm: kworker/u8:4 Tainted: G A 4.15.0-rc4custom+ #4 Hardware name: Apple Inc. MacBook8,1/Mac-BE0E8AC46FE800CC, BIOS MB81.88Z.0168.B00.1708080033 08/08/2017 Call Trace: bcm_serdev_probe+0x8b/0xc0 driver_probe_device+0x202/0x310 __driver_attach+0x85/0x90 ? driver_probe_device+0x310/0x310 bus_for_each_dev+0x57/0x80 async_run_entry_fn+0x2c/0xd0 process_one_work+0x1d2/0x3d0 worker_thread+0x26/0x3c0 ? process_one_work+0x3d0/0x3d0 kthread+0x10c/0x130 ? kthread_create_on_node+0x40/0x40 ret_from_fork+0x1f/0x30 We could call gpiod_to_irq() only if IS_ENABLED(CONFIG_GPIOLIB) but without GPIOLIB, the driver's power saving features can't be used, so selecting GPIOLIB seems more appropriate. The same issue is present in hci_intel.c and hci_nokia.c, fix those up as well. Reported-by: Max Shavrick Signed-off-by: Lukas Wunner --- drivers/bluetooth/Kconfig | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 45a2f59cd935..41932f0e68d0 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -110,6 +110,7 @@ config BT_HCIUART_NOKIA depends on PM select BT_HCIUART_H4 select BT_BCM + select GPIOLIB help Nokia H4+ is serial protocol for communication between Bluetooth device and host. This protocol is required for Bluetooth devices @@ -170,6 +171,7 @@ config BT_HCIUART_INTEL depends on BT_HCIUART select BT_HCIUART_H4 select BT_INTEL + select GPIOLIB help The Intel protocol support enables Bluetooth HCI over serial port interface for Intel Bluetooth controllers. @@ -183,6 +185,7 @@ config BT_HCIUART_BCM depends on (!ACPI || SERIAL_DEV_CTRL_TTYPORT) select BT_HCIUART_H4 select BT_BCM + select GPIOLIB help The Broadcom protocol support enables Bluetooth HCI over serial port interface for Broadcom Bluetooth controllers. -- 2.15.1