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Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc.

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[ 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@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tim Jiang 2021-06-01 17:57:10 +08:00 committed by Greg Kroah-Hartman
parent aa9a2ec7ee
commit d04cd2c4fd
1 changed files with 5 additions and 0 deletions
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5
drivers/bluetooth/btusb.c
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@ -3263,6 +3263,11 @@ 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);