Messages in this thread Patch in this message | | | From | Matthias Kaehlcke <> | Date | Wed, 13 Mar 2019 16:52:19 -0700 | Subject | [PATCH] Bluetooth: hci_qca: Fix crash with non-serdev devices |
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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 <bgodavar@codeaurora.org> Reported-by: Rocky Liao <rjliao@codeaurora.org> Signed-off-by: Matthias Kaehlcke <mka@chromium.org> --- drivers/bluetooth/hci_qca.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 4ea995d610d2..714a6a16f9d5 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1004,7 +1004,8 @@ 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 */ -- 2.21.0.360.g471c308f928-goog
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