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authorPavel Skripkin <paskripkin@gmail.com>2021-05-03 13:06:05 +0300
committerMarcel Holtmann <marcel@holtmann.org>2021-06-26 08:12:26 +0300
commit59f90f1351282ea2dbd0c59098fd9bb2634e920e (patch)
tree60a694b5235507cb44d5e63c77bc4adeae068040 /drivers/bluetooth/hci_qca.c
parent4ef36a52b0e47c80bbfd69c0cce61c7ae9f541ed (diff)
downloadlinux-59f90f1351282ea2dbd0c59098fd9bb2634e920e.tar.xz
Bluetooth: hci_qca: fix potential GPF
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>
Diffstat (limited to 'drivers/bluetooth/hci_qca.c')
-rw-r--r--drivers/bluetooth/hci_qca.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 0a0056912d51..dc6551d65912 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1835,8 +1835,6 @@ static void qca_power_shutdown(struct hci_uart *hu)
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 hci_uart *hu)
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);