This is a note to let you know that I've just added the patch titled
Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-btusb-fix-bt-fiwmare-downloading-failure-i.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d6c132072374b73edb9bd4b6d57c0699cb685ed3
Author: Tim Jiang <tjiang@xxxxxxxxxxxxxx>
Date: Tue Jun 1 17:57:10 2021 +0800
Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.
[ Upstream commit 4f00bfb372674d586c4a261bfc595cbce101fbb6 ]
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>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1b0adf5c2376..7188f0fb2e05 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2595,6 +2595,11 @@ 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);
