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 5.10-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-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 864d26803c4e078395a4afaa3d7731c28f9452c4
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 b3c63e06838d..afd2b1f12d49 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3558,6 +3558,11 @@ 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);
