Commit 113d5ca7 authored by Matthias Kaehlcke's avatar Matthias Kaehlcke Committed by Greg Kroah-Hartman

Bluetooth: btqca: Add a short delay before downloading the NVM

[ Upstream commit 8059ba0b ]

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: default avatarMatthias Kaehlcke <>
Signed-off-by: Marcel Holtmann's avatarMarcel Holtmann <>
Signed-off-by: default avatarSasha Levin <>
parent ab0f7497
......@@ -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 */
/* Download NVM configuration */
config.type = TLV_TYPE_NVM;
if (qca_is_wcn399x(soc_type))
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