5.15-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
commit 73e87c0a49fda31d7b589edccf4c72e924411371 upstream.
Qualcomm ROME controllers can be registered from the Bluetooth line discipline and in this case the HCI UART serdev pointer is NULL.
Add the missing sanity check to prevent a NULL-pointer dereference when wakeup() is called for a non-serdev controller during suspend.
Just return true for now to restore the original behaviour and address the crash with pre-6.2 kernels, which do not have commit e9b3e5b8c657 ("Bluetooth: hci_qca: only assign wakeup with serial port support") that causes the crash to happen already at setup() time.
Fixes: c1a74160eaf1 ("Bluetooth: hci_qca: Add device_may_wakeup support") Cc: stable@vger.kernel.org # 5.13 Signed-off-by: Johan Hovold johan+linaro@kernel.org Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/bluetooth/hci_qca.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1590,6 +1590,9 @@ static bool qca_prevent_wake(struct hci_ struct hci_uart *hu = hci_get_drvdata(hdev); bool wakeup;
+ if (!hu->serdev) + return true; + /* BT SoC attached through the serial bus is handled by the serdev driver. * So we need to use the device handle of the serdev driver to get the * status of device may wakeup.