[v3,1/3] Bluetooth: btusb: mediatek: use readx_poll_timeout instead of open coding

Commit Message

Sean Wang Nov. 21, 2022, 7:20 p.m. UTC

From: Sean Wang <[e-mail]>

Use readx_poll_timeout instead of open coding to poll the hardware reset
status until it is done.

Signed-off-by: Sean Wang <[e-mail]>
---
The patch is built and tested on the top of the patches
[v6,1/3] Bluetooth: Add support for hci devcoredump
[v6,2/3] Bluetooth: btusb: Add btusb devcoredump support
[v6,3/3] Bluetooth: btintel: Add Intel devcoredump support
which are contributed from Manish Mandlik

v2: use 20ms as the unit to poll according to the requirement of
    readx_poll_timeout

v3: refine btusb_mtk_reset_done and drop the necessary error check
    in btusb_mtk_cmd_timeout
---
 drivers/bluetooth/btusb.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

Comments

[e-mail] Nov. 21, 2022, 7:39 p.m. UTC | #1

This is an automated email and please do not reply to this email.

Dear Submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
While preparing the CI tests, the patches you submitted couldn't be applied to the current HEAD of the repository.

----- Output -----

error: patch failed: drivers/bluetooth/btusb.c:3845
error: drivers/bluetooth/btusb.c: patch does not apply
hint: Use 'git am --show-current-patch' to see the failed patch

Please resolve the issue and submit the patches again.


---
Regards,
Linux Bluetooth

Patch

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8d076efdf6a8..791bd3f620fc 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2321,8 +2321,6 @@  static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
 #define MTK_EP_RST_OPT		0x74011890
 #define MTK_EP_RST_IN_OUT_OPT	0x00010001
 #define MTK_BT_RST_DONE		0x00000100
-#define MTK_BT_RESET_WAIT_MS	100
-#define MTK_BT_RESET_NUM_TRIES	10
 
 static void btusb_mtk_wmt_recv(struct urb *urb)
 {
@@ -2679,6 +2677,16 @@  static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
 	return btusb_mtk_reg_read(data, reg, id);
 }
 
+static u32 btusb_mtk_reset_done(struct hci_dev *hdev)
+{
+	struct btusb_data *data = hci_get_drvdata(hdev);
+	u32 val = 0;
+
+	btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
+
+	return val & MTK_BT_RST_DONE;
+}
+
 static int btusb_mtk_setup(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
@@ -2868,7 +2876,7 @@  static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
 	u32 val;
-	int err, retry = 0;
+	int err;
 
 	/* It's MediaTek specific bluetooth reset mechanism via USB */
 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
@@ -2899,18 +2907,10 @@  static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
 	btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
 	btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
 
-	/* Poll the register until reset is completed */
-	do {
-		btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
-		if (val & MTK_BT_RST_DONE) {
-			bt_dev_dbg(hdev, "Bluetooth Reset Successfully");
-			break;
-		}
-
-		bt_dev_dbg(hdev, "Polling Bluetooth Reset CR");
-		retry++;
-		msleep(MTK_BT_RESET_WAIT_MS);
-	} while (retry < MTK_BT_RESET_NUM_TRIES);
+	err = readx_poll_timeout(btusb_mtk_reset_done, hdev, val,
+				 val & MTK_BT_RST_DONE, 20000, 1000000);
+	if (err < 0)
+		bt_dev_err(hdev, "Reset timeout");
 
 	btusb_mtk_id_get(data, 0x70010200, &val);
 	if (!val)