ehea: use kernel event queue

eHEA recovery and DLPAR functions are called seldomly. The eHEA workqueues
are replaced by the kernel event queue.

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 10 insertions, 24 deletions

diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index 30220894b01f..ac21526b6de8 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -40,7 +40,7 @@
 #include <asm/io.h>
 
 #define DRV_NAME        "ehea"
-#define DRV_VERSION     "EHEA_0077"
+#define DRV_VERSION     "EHEA_0078"
 
 /* eHEA capability flags */
 #define DLPAR_PORT_ADD_REM 1
@@ -391,7 +391,6 @@ struct ehea_adapter {
         struct ibmebus_dev *ebus_dev;
         struct ehea_port *port[EHEA_MAX_PORTS];
         struct ehea_eq *neq;       /* notification event queue */
-        struct workqueue_struct *ehea_wq;
         struct tasklet_struct neq_tasklet;
         struct ehea_mr mr;
         u32 pd;                    /* protection domain */
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 5bc0a1530eb7..2ba57e6ace4d 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -94,7 +94,6 @@ MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 static int port_name_cnt = 0;
 static LIST_HEAD(adapter_list);
 u64 ehea_driver_flags = 0;
-struct workqueue_struct *ehea_driver_wq;
 struct work_struct ehea_rereg_mr_task;
 
 struct semaphore dlpar_mem_lock;
@@ -421,7 +420,7 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 
         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
                 ehea_error("Critical receive error. Resetting port.");
-                queue_work(pr->port->adapter->ehea_wq, &pr->port->reset_task);
+                schedule_work(&pr->port->reset_task);
                 return 1;
         }
 
@@ -596,8 +595,7 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
                         ehea_error("Send Completion Error: Resetting port");
                         if (netif_msg_tx_err(pr->port))
                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
-                        queue_work(pr->port->adapter->ehea_wq,
-                                   &pr->port->reset_task);
+                        schedule_work(&pr->port->reset_task);
                         break;
                 }
 
@@ -716,7 +714,7 @@ static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
                 eqe = ehea_poll_eq(port->qp_eq);
         }
 
-        queue_work(port->adapter->ehea_wq, &port->reset_task);
+        schedule_work(&port->reset_task);
 
         return IRQ_HANDLED;
 }
@@ -2395,7 +2393,7 @@ static int ehea_stop(struct net_device *dev)
         if (netif_msg_ifdown(port))
                 ehea_info("disabling port %s", dev->name);
 
-        flush_workqueue(port->adapter->ehea_wq);
+        flush_scheduled_work();
         down(&port->port_lock);
         netif_stop_queue(dev);
         ret = ehea_down(dev);
@@ -2710,7 +2708,7 @@ static void ehea_tx_watchdog(struct net_device *dev)
 
         if (netif_carrier_ok(dev) &&
             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
-                queue_work(port->adapter->ehea_wq, &port->reset_task);
+                schedule_work(&port->reset_task);
 }
 
 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
@@ -3243,15 +3241,9 @@ static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
                 goto out_kill_eq;
         }
 
-        adapter->ehea_wq = create_workqueue("ehea_wq");
-        if (!adapter->ehea_wq) {
-                ret = -EIO;
-                goto out_free_irq;
-        }
-
         ret = ehea_create_device_sysfs(dev);
         if (ret)
-                goto out_kill_wq;
+                goto out_free_irq;
 
         ret = ehea_setup_ports(adapter);
         if (ret) {
@@ -3265,9 +3257,6 @@ static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
 out_rem_dev_sysfs:
         ehea_remove_device_sysfs(dev);
 
-out_kill_wq:
-        destroy_workqueue(adapter->ehea_wq);
-
 out_free_irq:
         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
 
@@ -3293,7 +3282,7 @@ static int __devexit ehea_remove(struct ibmebus_dev *dev)
 
         ehea_remove_device_sysfs(dev);
 
-        destroy_workqueue(adapter->ehea_wq);
+        flush_scheduled_work();
 
         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
         tasklet_kill(&adapter->neq_tasklet);
@@ -3351,7 +3340,6 @@ int __init ehea_module_init(void)
         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
                DRV_VERSION);
 
-        ehea_driver_wq = create_workqueue("ehea_driver_wq");
 
         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
         sema_init(&dlpar_mem_lock, 1);
@@ -3385,7 +3373,7 @@ out:
 
 static void __exit ehea_module_exit(void)
 {
-        destroy_workqueue(ehea_driver_wq);
+        flush_scheduled_work();
         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
         ibmebus_unregister_driver(&ehea_driver);
         ehea_destroy_busmap();
diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c
index 329a25248d75..83b76432b41a 100644
--- a/drivers/net/ehea/ehea_qmr.c
+++ b/drivers/net/ehea/ehea_qmr.c
@@ -34,7 +34,6 @@
 
 struct ehea_busmap ehea_bmap = { 0, 0, NULL };
 extern u64 ehea_driver_flags;
-extern struct workqueue_struct *ehea_driver_wq;
 extern struct work_struct ehea_rereg_mr_task;
 
 
@@ -618,7 +617,7 @@ u64 ehea_map_vaddr(void *caddr)
 
         if (unlikely(mapped_addr == -1))
                 if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
-                        queue_work(ehea_driver_wq, &ehea_rereg_mr_task);
+                        schedule_work(&ehea_rereg_mr_task);
 
         return mapped_addr;
 }