[ 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 <m...@chromium.org>
Signed-off-by: Marcel Holtmann <mar...@holtmann.org>
Signed-off-by: Sasha Levin <sas...@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 aff1d22223bd4..0ee5acb685a10 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -350,6 +350,9 @@ int qca_uart_setup(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;
if (qca_is_wcn399x(soc_type))
--
2.20.1
