From: Mark Chen <mark-yw.chen@mediatek.com>
Date: Wed, 12 Jan 2022 15:39:13 +0800
Subject: Bluetooth: mt7921s: fix bus hang with wrong privilege
Patch-mainline: v5.18-rc1
Git-commit: 752aea58489fd42f5c54dc50cb098d19e486ae61
References: jsc#PED-1407
According to chip hw flow, mt7921s need to re-acquire privilege
again before normal running. Otherwise, the bus may be stuck in
an abnormal status.
Fixes: c603bf1f94d0 ("Bluetooth: btmtksdio: add MT7921s Bluetooth support")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Mark Chen <mark-yw.chen@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
drivers/bluetooth/btmtksdio.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -960,6 +960,14 @@ static int btmtksdio_setup(struct hci_de
if (err < 0)
return err;
+ err = btmtksdio_fw_pmctrl(bdev);
+ if (err < 0)
+ return err;
+
+ err = btmtksdio_drv_pmctrl(bdev);
+ if (err < 0)
+ return err;
+
/* Enable SCO over I2S/PCM */
err = btmtksdio_sco_setting(hdev);
if (err < 0) {