From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx> Controller will reset after NVM is downloaded for QCA device, so wait a moment for reset Done then go ahead to improve stability. Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx> --- drivers/bluetooth/btusb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index e03dfbd92fcc..0ec2f17fe1d3 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2994,6 +2994,7 @@ static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev, #define QCA_PATCH_UPDATED 0x80 #define QCA_DFU_TIMEOUT 3000 #define QCA_FLAG_MULTI_NVM 0x80 +#define QCA_BT_RESET_WAIT_MS 100 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211 @@ -3320,6 +3321,10 @@ static int btusb_setup_qca(struct hci_dev *hdev) err = btusb_setup_qca_load_nvm(hdev, &ver, info); if (err < 0) return err; + /* Controller will reset after NVM is downloaded, so wait a moment + * for reset Done, it will prevent controller from potential crash. + */ + msleep(QCA_BT_RESET_WAIT_MS); } return 0; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
