nvec: use system_nrt_wq instead of custom one

There isn't much reason to use custom workqueue in nvec. It can use system_nrt_wq instead and cancel the two work items on removal.

Signed-off-by Tejun Heo <[email protected]>

---
Marc, I think I'll do this conversion in two steps. system_nrt_wq -> system_wq conversion should be trivial after 3.7 merge window.

 drivers/staging/nvec/nvec.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

drivers/staging/nvec/nvec.c +4 -6

index 695ea35..daaef24 100644
@@ -264,7 +264,7 @@ int nvec_write_async(struct nvec_chip *nvec, const
 unsigned char *data, list_add_tail(&msg->node, &nvec->tx_data);
 	spin_unlock_irqrestore(&nvec->tx_lock, flags);
 
-	queue_work(nvec->wq, &nvec->tx_work);
+	queue_work(system_nrt_wq, &nvec->tx_work);
 
 	return 0;
 }

@@ -470,7 +470,7 @@ static void nvec_rx_completed(struct nvec_chip *nvec)
 	if (!nvec_msg_is_event(nvec->rx))
 		complete(&nvec->ec_transfer);
 
-	queue_work(nvec->wq, &nvec->rx_work);
+	queue_work(system_nrt_wq, &nvec->rx_work);
 }
 
 /**

@@ -791,13 +791,11 @@ static int __devinit tegra_nvec_probe(struct
 platform_device *pdev) INIT_LIST_HEAD(&nvec->tx_data);
 	INIT_WORK(&nvec->rx_work, nvec_dispatch);
 	INIT_WORK(&nvec->tx_work, nvec_request_master);
-	nvec->wq = alloc_workqueue("nvec", WQ_NON_REENTRANT, 2);
 
 	err = devm_gpio_request_one(&pdev->dev, nvec->gpio, GPIOF_OUT_INIT_HIGH,
 					"nvec gpio");
 	if (err < 0) {
 		dev_err(nvec->dev, "couldn't request gpio\n");
-		destroy_workqueue(nvec->wq);
 		return -ENODEV;
 	}
 

@@ -805,7 +803,6 @@ static int __devinit tegra_nvec_probe(struct
 platform_device *pdev) "nvec", nvec);
 	if (err) {
 		dev_err(nvec->dev, "couldn't request irq\n");
-		destroy_workqueue(nvec->wq);
 		return -ENODEV;
 	}
 	disable_irq(nvec->irq);

@@ -859,7 +856,8 @@ static int __devexit tegra_nvec_remove(struct
 platform_device *pdev)
 
 	nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3);
 	mfd_remove_devices(nvec->dev);
-	destroy_workqueue(nvec->wq);
+	cancel_work_sync(&nvec->rx_work);
+	cancel_work_sync(&nvec->tx_work);
 
 	return 0;

}