From: Pavel Skripkin paskripkin@gmail.com
commit 59f90f1351282ea2dbd0c59098fd9bb2634e920e upstream.
In qca_power_shutdown() qcadev local variable is initialized by hu->serdev.dev private data, but hu->serdev can be NULL and there is a check for it.
Since, qcadev is not used before
if (!hu->serdev) return;
we can move its initialization after this "if" to prevent GPF.
Fixes: 5559904ccc08 ("Bluetooth: hci_qca: Add QCA Rome power off support to the qca_power_shutdown()") Cc: stable@vger.kernel.org # v5.6+ Cc: Rocky Liao rjliao@codeaurora.org Signed-off-by: Pavel Skripkin paskripkin@gmail.com Reviewed-by: Johan Hovold johan@kernel.org Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/bluetooth/hci_qca.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1835,8 +1835,6 @@ static void qca_power_shutdown(struct hc unsigned long flags; enum qca_btsoc_type soc_type = qca_soc_type(hu);
- qcadev = serdev_device_get_drvdata(hu->serdev); - /* From this point we go into power off state. But serial port is * still open, stop queueing the IBS data and flush all the buffered * data in skb's. @@ -1852,6 +1850,8 @@ static void qca_power_shutdown(struct hc if (!hu->serdev) return;
+ qcadev = serdev_device_get_drvdata(hu->serdev); + if (qca_is_wcn399x(soc_type)) { host_set_baudrate(hu, 2400); qca_send_power_pulse(hu, false);