Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca bt…

…soc. This is btsoc timing issue, after host start to downloading bt firmware, ep2 need time to switch from function acl to function dfu, so host add 20ms delay as workaround. Signed-off-by: Tim Jiang <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
vieko · Jun 26, 2021 · 4f00bfb · 4f00bfb
1 parent ca17a5c
commit 4f00bfb
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
@@ -4080,6 +4080,11 @@ static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
 	sent += size;
 	count -= size;
 
+	/* ep2 need time to switch from function acl to function dfu,
+	 * so we add 20ms delay here.
+	 */
+	msleep(20);
+
 	while (count) {
 		size = min_t(size_t, count, QCA_DFU_PACKET_LEN);