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staging: unisys: visornic: Remove create_singlethread_workqueue()

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With concurrency managed workqueues, use of dedicated workqueues
can be replaced by using system_wq.
Drop visornic_timeout_reset_workqueue by using system_wq.

Since there is only one work item per devdata and different
devdatas do not need to be ordered, increase of concurrency
level by switching to system_wq should not break anything.

cancel_work_sync() is used to ensure that work is not pending or
executing on any CPU.

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Tested-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amitoj Kaur Chawla 2016-02-28 18:26:37 +05:30 committed by Greg Kroah-Hartman
parent 0bde29799a
commit ce388d7e65
1 changed files with 2 additions and 19 deletions
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21
drivers/staging/unisys/visornic/visornic_main.c
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@ -59,8 +59,6 @@ static const struct file_operations debugfs_enable_ints_fops = {
.write = enable_ints_write,
};
static struct workqueue_struct *visornic_timeout_reset_workqueue;
/* GUIDS for director channel type supported by this driver. */
static struct visor_channeltype_descriptor visornic_channel_types[] = {
/* Note that the only channel type we expect to be reported by the
@ -1070,7 +1068,7 @@ visornic_xmit_timeout(struct net_device *netdev)
spin_unlock_irqrestore(&devdata->priv_lock, flags);
return;
}
queue_work(visornic_timeout_reset_workqueue, &devdata->timeout_reset);
schedule_work(&devdata->timeout_reset);
spin_unlock_irqrestore(&devdata->priv_lock, flags);
}
@ -1998,7 +1996,7 @@ static void visornic_remove(struct visor_device *dev)
}
/* going_away prevents new items being added to the workqueues */
flush_workqueue(visornic_timeout_reset_workqueue);
cancel_work_sync(&devdata->timeout_reset);
debugfs_remove_recursive(devdata->eth_debugfs_dir);
@ -2117,21 +2115,10 @@ static int visornic_init(void)
if (!ret)
goto cleanup_debugfs;
/* create workqueue for tx timeout reset */
visornic_timeout_reset_workqueue =
create_singlethread_workqueue("visornic_timeout_reset");
if (!visornic_timeout_reset_workqueue)
goto cleanup_workqueue;
err = visorbus_register_visor_driver(&visornic_driver);
if (!err)
return 0;
cleanup_workqueue:
if (visornic_timeout_reset_workqueue) {
flush_workqueue(visornic_timeout_reset_workqueue);
destroy_workqueue(visornic_timeout_reset_workqueue);
}
cleanup_debugfs:
debugfs_remove_recursive(visornic_debugfs_dir);
@ -2147,10 +2134,6 @@ static void visornic_cleanup(void)
{
visorbus_unregister_visor_driver(&visornic_driver);
if (visornic_timeout_reset_workqueue) {
flush_workqueue(visornic_timeout_reset_workqueue);
destroy_workqueue(visornic_timeout_reset_workqueue);
}
debugfs_remove_recursive(visornic_debugfs_dir);
}