* [PATCH v1] Bluetooth: btusb: Improve stability for QCA devices
@ 2022-02-11 7:56 Zijun Hu
0 siblings, 0 replies; only message in thread
From: Zijun Hu @ 2022-02-11 7:56 UTC (permalink / raw)
To: marcel, johan.hedberg, luiz.dentz
Cc: linux-kernel, linux-bluetooth, linux-arm-msm, c-hbandi, hemantg,
rjliao, zijuhu, tjiang, Zijun Hu
From: Zijun Hu <quic_zijuhu@quicinc.com>
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@quicinc.com>
---
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;
--
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