linux-kernel - [PATCH 5.13 33/35] Revert "Bluetooth: Shutdown controller after workqueues are flushed or cancelled"

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Message-Id: <20210806081114.810836917@linuxfoundation.org>
Date:   Fri,  6 Aug 2021 10:17:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 33/35] Revert "Bluetooth: Shutdown controller after workqueues are flushed or cancelled"

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

This reverts commit c19a2820df32b94d1d4fb65e96ae36f97dddda56 which is
commit 0ea9fd001a14ebc294f112b0361a4e601551d508 upstream.

It has been reported to have problems:
	https://lore.kernel.org/linux-bluetooth/8735ryk0o7.fsf@baylibre.com/

Reported-by: Guenter Roeck <linux@...ck-us.net>
Cc: Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc: Marcel Holtmann <marcel@...tmann.org>
Cc: Sasha Levin <sashal@...nel.org>
Link: https://lore.kernel.org/r/efee3a58-a4d2-af22-0931-e81b877ab539@roeck-us.net
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/bluetooth/hci_core.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1721,6 +1721,14 @@ int hci_dev_do_close(struct hci_dev *hde
 
 	BT_DBG("%s %p", hdev->name, hdev);
 
+	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
+	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+	    test_bit(HCI_UP, &hdev->flags)) {
+		/* Execute vendor specific shutdown routine */
+		if (hdev->shutdown)
+			hdev->shutdown(hdev);
+	}
+
 	cancel_delayed_work(&hdev->power_off);
 
 	hci_request_cancel_all(hdev);
@@ -1797,14 +1805,6 @@ int hci_dev_do_close(struct hci_dev *hde
 		clear_bit(HCI_INIT, &hdev->flags);
 	}
 
-	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
-	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
-	    test_bit(HCI_UP, &hdev->flags)) {
-		/* Execute vendor specific shutdown routine */
-		if (hdev->shutdown)
-			hdev->shutdown(hdev);
-	}
-
 	/* flush cmd  work */
 	flush_work(&hdev->cmd_work);