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authorMatthias Kaehlcke <mka@chromium.org>2019-07-10 01:44:50 +0300
committerMarcel Holtmann <marcel@holtmann.org>2019-08-12 19:23:49 +0300
commit8059ba0bd0e4694e51c2ee6438a77b325f06c0d5 (patch)
tree038e9f554bc53227dc481706554e8df33b755dc8 /drivers/bluetooth
parent5ee6310fb163ba7c66718905d4a19f1e71e641e0 (diff)
downloadlinux-8059ba0bd0e4694e51c2ee6438a77b325f06c0d5.tar.xz
Bluetooth: btqca: Add a short delay before downloading the NVM
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>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/btqca.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 8b33128dccee..c59ca5782b63 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -388,6 +388,9 @@ 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 (firmware_name)