From: Matthias Kaehlcke mka@chromium.org
[ Upstream commit 8059ba0bd0e4694e51c2ee6438a77b325f06c0d5 ]
On WCN3990 downloading the NVM sometimes fails with a "TLV response size mismatch" error:
[ 174.949955] Bluetooth: btqca.c:qca_download_firmware() hci0: QCA Downloading qca/crnv21.bin [ 174.958718] Bluetooth: btqca.c:qca_tlv_send_segment() hci0: QCA TLV response size mismatch
It seems the controller needs a short time after downloading the firmware before it is ready for the NVM. A delay as short as 1 ms seems sufficient, make it 10 ms just in case. No event is received during the delay, hence we don't just silently drop an extra event.
Signed-off-by: Matthias Kaehlcke mka@chromium.org Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/bluetooth/btqca.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c index 0bbdfcef2aa84..a48a61f22f823 100644 --- a/drivers/bluetooth/btqca.c +++ b/drivers/bluetooth/btqca.c @@ -363,6 +363,9 @@ int qca_uart_setup_rome(struct hci_dev *hdev, uint8_t baudrate) return err; }
+ /* Give the controller some time to get ready to receive the NVM */ + msleep(10); + /* Download NVM configuration */ config.type = TLV_TYPE_NVM; snprintf(config.fwname, sizeof(config.fwname), "qca/nvm_%08x.bin",