[PATCH v2] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.

[Zijun Hu]

From: Tim Jiang <tjiang@xxxxxxxxxxxxxx>

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 <tjiang@xxxxxxxxxxxxxx>
---
 drivers/bluetooth/btusb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5245714..b0743db 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4064,6 +4064,7 @@ static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
 
 	sent += size;
 	count -= size;
+	msleep(20);
 
 	while (count) {
 		size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
-- 
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