Bluetooth: Create per controller workqueue

Instead of having a global workqueue for all controllers, it makes
more sense to have a workqueue per controller.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 4511df2..e42f6ed 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -107,6 +107,8 @@ struct hci_dev {
        unsigned long   acl_last_tx;
        unsigned long   sco_last_tx;
 
+       struct workqueue_struct *workqueue;
+
        struct tasklet_struct   cmd_task;
        struct tasklet_struct   rx_task;
        struct tasklet_struct   tx_task;

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 904f1e8..5e83f8e 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -37,6 +37,7 @@
 #include <linux/fcntl.h>
 #include <linux/init.h>
 #include <linux/skbuff.h>
+#include <linux/workqueue.h>
 #include <linux/interrupt.h>
 #include <linux/notifier.h>
 #include <linux/rfkill.h>
@@ -928,6 +929,10 @@ int hci_register_dev(struct hci_dev *hdev)
 
        write_unlock_bh(&hci_dev_list_lock);
 
+       hdev->workqueue = create_singlethread_workqueue(hdev->name);
+       if (!hdev->workqueue)
+               goto nomem;
+
        hci_register_sysfs(hdev);
 
        hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
@@ -942,6 +947,13 @@ int hci_register_dev(struct hci_dev *hdev)
        hci_notify(hdev, HCI_DEV_REG);
 
        return id;
+
+nomem:
+       write_lock_bh(&hci_dev_list_lock);
+       list_del(&hdev->list);
+       write_unlock_bh(&hci_dev_list_lock);
+
+       return -ENOMEM;
 }
 EXPORT_SYMBOL(hci_register_dev);
 
@@ -970,6 +982,8 @@ int hci_unregister_dev(struct hci_dev *hdev)
 
        hci_unregister_sysfs(hdev);
 
+       destroy_workqueue(hdev->workqueue);
+
        __hci_dev_put(hdev);
 
        return 0;

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 0e8e1a5..a978449 100644 (file)
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -14,8 +14,6 @@ static struct class *bt_class;
 struct dentry *bt_debugfs = NULL;
 EXPORT_SYMBOL_GPL(bt_debugfs);
 
-static struct workqueue_struct *bt_workq;
-
 static inline char *link_typetostr(int type)
 {
        switch (type) {
@@ -161,14 +159,14 @@ void hci_conn_add_sysfs(struct hci_conn *conn)
 {
        BT_DBG("conn %p", conn);
 
-       queue_work(bt_workq, &conn->work_add);
+       queue_work(conn->hdev->workqueue, &conn->work_add);
 }
 
 void hci_conn_del_sysfs(struct hci_conn *conn)
 {
        BT_DBG("conn %p", conn);
 
-       queue_work(bt_workq, &conn->work_del);
+       queue_work(conn->hdev->workqueue, &conn->work_del);
 }
 
 static inline char *host_bustostr(int bus)
@@ -487,17 +485,11 @@ void hci_unregister_sysfs(struct hci_dev *hdev)
 
 int __init bt_sysfs_init(void)
 {
-       bt_workq = create_singlethread_workqueue("bluetooth");
-       if (!bt_workq)
-               return -ENOMEM;
-
        bt_debugfs = debugfs_create_dir("bluetooth", NULL);
 
        bt_class = class_create(THIS_MODULE, "bluetooth");
-       if (IS_ERR(bt_class)) {
-               destroy_workqueue(bt_workq);
+       if (IS_ERR(bt_class))
                return PTR_ERR(bt_class);
-       }
 
        return 0;
 }
@@ -507,6 +499,4 @@ void bt_sysfs_cleanup(void)
        class_destroy(bt_class);
 
        debugfs_remove_recursive(bt_debugfs);
-
-       destroy_workqueue(bt_workq);
 }