diff options
| author | Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2020-04-02 14:55:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-22 09:31:18 +0200 |
| commit | eeb0cf8bb68e4d7a20646d7234badab8a96e32ac (patch) | |
| tree | f73922cf6fd43f2f49c189a3ebb362cd99a13a57 | |
| parent | 4c79dd14c15dd24dcf6145d9cf58ba1c7b138097 (diff) | |
Bluetooth: hci_bcm: fix freeing not-requested IRQ
commit 81bd5d0c62437c02caac6b3f942fcda874063cb0 upstream.
When BT module can't be initialized, but it has an IRQ, unloading
the driver WARNs when trying to free not-yet-requested IRQ. Fix it by
noting whether the IRQ was requested.
WARNING: CPU: 2 PID: 214 at kernel/irq/devres.c:144 devm_free_irq+0x49/0x4ca
[...]
WARNING: CPU: 2 PID: 214 at kernel/irq/manage.c:1746 __free_irq+0x8b/0x27c
Trying to free already-free IRQ 264
Modules linked in: hci_uart(-) btbcm bluetooth ecdh_generic ecc libaes
CPU: 2 PID: 214 Comm: rmmod Tainted: G W 5.6.1mq-00044-ga5f9ea098318-dirty #928
[...]
[<b016aefb>] (devm_free_irq) from [<af8ba1ff>] (bcm_close+0x97/0x118 [hci_uart])
[<af8ba1ff>] (bcm_close [hci_uart]) from [<af8b736f>] (hci_uart_unregister_device+0x33/0x3c [hci_uart])
[<af8b736f>] (hci_uart_unregister_device [hci_uart]) from [<b035930b>] (serdev_drv_remove+0x13/0x20)
[<b035930b>] (serdev_drv_remove) from [<b037093b>] (device_release_driver_internal+0x97/0x118)
[<b037093b>] (device_release_driver_internal) from [<b0370a0b>] (driver_detach+0x2f/0x58)
[<b0370a0b>] (driver_detach) from [<b036f855>] (bus_remove_driver+0x41/0x94)
[<b036f855>] (bus_remove_driver) from [<af8ba8db>] (bcm_deinit+0x1b/0x740 [hci_uart])
[<af8ba8db>] (bcm_deinit [hci_uart]) from [<af8ba86f>] (hci_uart_exit+0x13/0x30 [hci_uart])
[<af8ba86f>] (hci_uart_exit [hci_uart]) from [<b01900bd>] (sys_delete_module+0x109/0x1d0)
[<b01900bd>] (sys_delete_module) from [<b0101001>] (ret_fast_syscall+0x1/0x5a)
[...]
Cc: stable@vger.kernel.org
Fixes: 6cc4396c8829 ("Bluetooth: hci_bcm: Add wake-up capability")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 7646636f2d18..94ed734c1d7e 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -107,6 +107,7 @@ struct bcm_device { u32 oper_speed; int irq; bool irq_active_low; + bool irq_acquired; #ifdef CONFIG_PM struct hci_uart *hu; @@ -319,6 +320,8 @@ static int bcm_request_irq(struct bcm_data *bcm) goto unlock; } + bdev->irq_acquired = true; + device_init_wakeup(bdev->dev, true); pm_runtime_set_autosuspend_delay(bdev->dev, @@ -487,7 +490,7 @@ static int bcm_close(struct hci_uart *hu) } if (bdev) { - if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { + if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { devm_free_irq(bdev->dev, bdev->irq, bdev); device_init_wakeup(bdev->dev, false); pm_runtime_disable(bdev->dev); |