linux-kernel - [BUG][PATCH] bluetooth: put_device before device

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Date:	Thu, 27 Dec 2007 13:27:50 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	marcel@...tmann.org
Cc:	akpm@...ux-foundation.org, greg@...ah.com,
	linux-kernel@...r.kernel.org, bluez-devel@...ts.sourceforge.net
Subject: [BUG][PATCH] bluetooth: put_device before device_del fix

Because of workqueue delay, the put_device could be called before device_del, so move it to del_conn.

Signed-off-by: Dave Young <hidave.darkstar@...il.com> 

---
net/bluetooth/hci_conn.c  |   10 +---------
net/bluetooth/hci_sysfs.c |    1 +
2 files changed, 2 insertions(+), 9 deletions(-)

diff -upr linux/net/bluetooth/hci_conn.c linux.new/net/bluetooth/hci_conn.c
--- linux/net/bluetooth/hci_conn.c	2007-12-27 13:12:48.000000000 +0800
+++ linux.new/net/bluetooth/hci_conn.c	2007-12-27 13:17:50.000000000 +0800
@@ -254,22 +254,14 @@ int hci_conn_del(struct hci_conn *conn)
 	}
 
 	tasklet_disable(&hdev->tx_task);
-
-	hci_conn_del_sysfs(conn);
-
 	hci_conn_hash_del(hdev, conn);
 	if (hdev->notify)
 		hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
-
 	tasklet_enable(&hdev->tx_task);
-
 	skb_queue_purge(&conn->data_q);
-
+	hci_conn_del_sysfs(conn);
 	hci_dev_put(hdev);
 
-	/* will free via device release */
-	put_device(&conn->dev);
-
 	return 0;
 }
 
diff -upr linux/net/bluetooth/hci_sysfs.c linux.new/net/bluetooth/hci_sysfs.c
--- linux/net/bluetooth/hci_sysfs.c	2007-12-27 13:12:48.000000000 +0800
+++ linux.new/net/bluetooth/hci_sysfs.c	2007-12-27 13:14:06.000000000 +0800
@@ -320,6 +320,7 @@ static void del_conn(struct work_struct 
 {
 	struct hci_conn *conn = container_of(work, struct hci_conn, work);
 	device_del(&conn->dev);
+	put_device(&conn->dev);
 }
 
 void hci_conn_del_sysfs(struct hci_conn *conn)
--
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