Revert "IPoIB: No longer use flush as a parameter"

This reverts commit ce347ab90eaabc69a6146d41943981d51e7a9b82.

The series of IPoIB bug fixes that went into 3.19-rc1 introduce
regressions, and after trying to sort things out, we decided to revert
to 3.18's IPoIB driver and get things right for 3.20.

Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 8ba80a6..28dc927 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -484,10 +484,10 @@ void ipoib_ib_dev_flush_heavy(struct work_struct *work);
 void ipoib_pkey_event(struct work_struct *work);
 void ipoib_ib_dev_cleanup(struct net_device *dev);
 
-int ipoib_ib_dev_open(struct net_device *dev);
+int ipoib_ib_dev_open(struct net_device *dev, int flush);
 int ipoib_ib_dev_up(struct net_device *dev);
-int ipoib_ib_dev_down(struct net_device *dev);
-int ipoib_ib_dev_stop(struct net_device *dev);
+int ipoib_ib_dev_down(struct net_device *dev, int flush);
+int ipoib_ib_dev_stop(struct net_device *dev, int flush);
 void ipoib_pkey_dev_check_presence(struct net_device *dev);
 
 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index fe65abb..6609678 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -664,7 +664,7 @@ static void ipoib_ib_tx_timer_func(unsigned long ctx)
        drain_tx_cq((struct net_device *)ctx);
 }
 
-int ipoib_ib_dev_open(struct net_device *dev)
+int ipoib_ib_dev_open(struct net_device *dev, int flush)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        int ret;
@@ -706,7 +706,7 @@ int ipoib_ib_dev_open(struct net_device *dev)
 dev_stop:
        if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
                napi_enable(&priv->napi);
-       ipoib_ib_dev_stop(dev);
+       ipoib_ib_dev_stop(dev, flush);
        return -1;
 }
 
@@ -738,7 +738,7 @@ int ipoib_ib_dev_up(struct net_device *dev)
        return ipoib_mcast_start_thread(dev);
 }
 
-int ipoib_ib_dev_down(struct net_device *dev)
+int ipoib_ib_dev_down(struct net_device *dev, int flush)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
 
@@ -807,7 +807,7 @@ void ipoib_drain_cq(struct net_device *dev)
        local_bh_enable();
 }
 
-int ipoib_ib_dev_stop(struct net_device *dev)
+int ipoib_ib_dev_stop(struct net_device *dev, int flush)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ib_qp_attr qp_attr;
@@ -880,7 +880,8 @@ timeout:
        /* Wait for all AHs to be reaped */
        set_bit(IPOIB_STOP_REAPER, &priv->flags);
        cancel_delayed_work(&priv->ah_reap_task);
-       flush_workqueue(priv->wq);
+       if (flush)
+               flush_workqueue(priv->wq);
 
        begin = jiffies;
 
@@ -917,7 +918,7 @@ int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
                    (unsigned long) dev);
 
        if (dev->flags & IFF_UP) {
-               if (ipoib_ib_dev_open(dev)) {
+               if (ipoib_ib_dev_open(dev, 1)) {
                        ipoib_transport_dev_cleanup(dev);
                        return -ENODEV;
                }
@@ -1039,12 +1040,12 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
        }
 
        if (level >= IPOIB_FLUSH_NORMAL)
-               ipoib_ib_dev_down(dev);
+               ipoib_ib_dev_down(dev, 0);
 
        if (level == IPOIB_FLUSH_HEAVY) {
                if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
-                       ipoib_ib_dev_stop(dev);
-               if (ipoib_ib_dev_open(dev) != 0)
+                       ipoib_ib_dev_stop(dev, 0);
+               if (ipoib_ib_dev_open(dev, 0) != 0)
                        return;
                if (netif_queue_stopped(dev))
                        netif_start_queue(dev);

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 6bad17d..42e5c27 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -108,7 +108,7 @@ int ipoib_open(struct net_device *dev)
 
        set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 
-       if (ipoib_ib_dev_open(dev)) {
+       if (ipoib_ib_dev_open(dev, 1)) {
                if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
                        return 0;
                goto err_disable;
@@ -139,7 +139,7 @@ int ipoib_open(struct net_device *dev)
        return 0;
 
 err_stop:
-       ipoib_ib_dev_stop(dev);
+       ipoib_ib_dev_stop(dev, 1);
 
 err_disable:
        clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
@@ -157,8 +157,8 @@ static int ipoib_stop(struct net_device *dev)
 
        netif_stop_queue(dev);
 
-       ipoib_ib_dev_down(dev);
-       ipoib_ib_dev_stop(dev);
+       ipoib_ib_dev_down(dev, 1);
+       ipoib_ib_dev_stop(dev, 0);
 
        if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
                struct ipoib_dev_priv *cpriv;