From: Matthias Kaehlcke Date: Tue, 23 Apr 2019 18:16:52 +0000 (-0700) Subject: Bluetooth: hci_qca: Fix crash with non-serdev devices X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ecf2b768bd11e2ff09ecbe621b387d0d58e970cf;p=openwrt%2Fstaging%2Fblogic.git Bluetooth: hci_qca: Fix crash with non-serdev devices qca_set_baudrate() calls serdev_device_wait_until_sent() assuming that the HCI is always associated with a serdev device. This isn't true for ROME controllers instantiated through ldisc, where the call causes a crash due to a NULL pointer dereferentiation. Only call the function when we have a serdev device. The timeout for ROME devices at the end of qca_set_baudrate() is long enough to be reasonably sure that the command was sent. Fixes: fa9ad876b8e0 ("Bluetooth: hci_qca: Add support for Qualcomm Bluetooth chip wcn3990") Reported-by: Balakrishna Godavarthi Reported-by: Rocky Liao Signed-off-by: Matthias Kaehlcke Reviewed-by: Rocky Liao Tested-by: Rocky Liao Reviewed-by: Balakrishna Godavarthi Signed-off-by: Marcel Holtmann --- diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index a80c3bc90904..7f75652686fe 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1006,7 +1006,8 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) while (!skb_queue_empty(&qca->txq)) usleep_range(100, 200); - serdev_device_wait_until_sent(hu->serdev, + if (hu->serdev) + serdev_device_wait_until_sent(hu->serdev, msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); /* Give the controller time to process the request */