[PATCH v2] Bluetooth: btusb: mediatek: fix shutdown failure during runtime suspend

[PATCH v2] Bluetooth: btusb: mediatek: fix shutdown failure during runtime suspend

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

Fix the WMT command timed out during Bluetooth was being shutdown while USB
was in runtime suspend state.

Fixes: a1c49c434e15 ("Bluetooth: btusb: Add protocol support for MediaTek MT7668U USB devices")
Co-developed-by: Jing Cai <jing.cai@mediatek.com>
Signed-off-by: Jing Cai <jing.cai@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 drivers/bluetooth/btusb.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index fb1a67189412..b1161853c6ab 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2795,10 +2795,15 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 
 static int btusb_mtk_shutdown(struct hci_dev *hdev)
 {
+	struct btusb_data *data = hci_get_drvdata(hdev);
 	struct btmtk_hci_wmt_params wmt_params;
 	u8 param = 0;
 	int err;
 
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return err;
+
 	/* Disable the device */
 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
 	wmt_params.flag = 0;
@@ -2807,12 +2812,12 @@ static int btusb_mtk_shutdown(struct hci_dev *hdev)
 	wmt_params.status = NULL;
 
 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
-	if (err < 0) {
+	if (err < 0)
 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
-		return err;
-	}
 
-	return 0;
+	usb_autopm_put_interface(data->intf);
+
+	return err;
 }
 
 static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
-- 
2.25.1

RE: [v2] Bluetooth: btusb: mediatek: fix shutdown failure during runtime suspend

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1100 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=659440

---Test result---

Test Summary:
CheckPatch                    PASS      1.02 seconds
GitLint                       PASS      0.45 seconds
SubjectPrefix                 PASS      0.33 seconds
BuildKernel                   PASS      41.55 seconds
BuildKernel32                 PASS      37.70 seconds
Incremental Build with patchesPASS      49.91 seconds
TestRunner: Setup             PASS      620.74 seconds
TestRunner: l2cap-tester      PASS      20.09 seconds
TestRunner: bnep-tester       PASS      7.29 seconds
TestRunner: mgmt-tester       PASS      122.23 seconds
TestRunner: rfcomm-tester     PASS      11.24 seconds
TestRunner: sco-tester        PASS      10.85 seconds
TestRunner: smp-tester        PASS      11.16 seconds
TestRunner: userchan-tester   PASS      7.91 seconds



---
Regards,
Linux Bluetooth

Re: [v2] Bluetooth: btusb: mediatek: fix shutdown failure during runtime suspend

[Luiz Augusto von Dentz]

Hi Sean,

On Wed, Jul 13, 2022 at 2:15 PM <bluez.test.bot@gmail.com> wrote:
>
> This is automated email and please do not reply to this email!
>
> Dear submitter,
>
> Thank you for submitting the patches to the linux bluetooth mailing list.
> This is a CI test results with your patch series:
> PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=659440
>
> ---Test result---
>
> Test Summary:
> CheckPatch                    PASS      1.02 seconds
> GitLint                       PASS      0.45 seconds
> SubjectPrefix                 PASS      0.33 seconds
> BuildKernel                   PASS      41.55 seconds
> BuildKernel32                 PASS      37.70 seconds
> Incremental Build with patchesPASS      49.91 seconds
> TestRunner: Setup             PASS      620.74 seconds
> TestRunner: l2cap-tester      PASS      20.09 seconds
> TestRunner: bnep-tester       PASS      7.29 seconds
> TestRunner: mgmt-tester       PASS      122.23 seconds
> TestRunner: rfcomm-tester     PASS      11.24 seconds
> TestRunner: sco-tester        PASS      10.85 seconds
> TestRunner: smp-tester        PASS      11.16 seconds
> TestRunner: userchan-tester   PASS      7.91 seconds
>
>
>
> ---
> Regards,
> Linux Bluetooth

Need more context to be able to merge this, why are you using
usb_autopm_get_interface/usb_autopm_put_interface and shouldn't that
be generalized if that is required to handle suspend properly?



-- 
Luiz Augusto von Dentz