Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IPoIB: Fix deadlock on RTNL in ipoib_stop()
  IB/ipath: Fix incorrect check for max physical address in TID
  IB/ipath: Fix lost UD send work request

4 files changed, 25 insertions, 14 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_iba7220.c b/drivers/infiniband/hw/ipath/ipath_iba7220.c
index d90f5e9a54fa..9839e20119bc 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba7220.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba7220.c
@@ -1720,7 +1720,7 @@ static void ipath_7220_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
                                  "not 2KB aligned!\n", pa);
                         return;
                 }
-                if (pa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
+                if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
                         ipath_dev_err(dd,
                                       "BUG: Physical page address 0x%lx "
                                       "larger than supported\n", pa);
diff --git a/drivers/infiniband/hw/ipath/ipath_ud.c b/drivers/infiniband/hw/ipath/ipath_ud.c
index 36aa242c487c..729446f56aab 100644
--- a/drivers/infiniband/hw/ipath/ipath_ud.c
+++ b/drivers/infiniband/hw/ipath/ipath_ud.c
@@ -267,6 +267,7 @@ int ipath_make_ud_req(struct ipath_qp *qp)
         u16 lrh0;
         u16 lid;
         int ret = 0;
+        int next_cur;
 
         spin_lock_irqsave(&qp->s_lock, flags);
 
@@ -290,8 +291,9 @@ int ipath_make_ud_req(struct ipath_qp *qp)
                 goto bail;
 
         wqe = get_swqe_ptr(qp, qp->s_cur);
-        if (++qp->s_cur >= qp->s_size)
-                qp->s_cur = 0;
+        next_cur = qp->s_cur + 1;
+        if (next_cur >= qp->s_size)
+                next_cur = 0;
 
         /* Construct the header. */
         ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr;
@@ -315,6 +317,7 @@ int ipath_make_ud_req(struct ipath_qp *qp)
                                 qp->s_flags |= IPATH_S_WAIT_DMA;
                                 goto bail;
                         }
+                        qp->s_cur = next_cur;
                         spin_unlock_irqrestore(&qp->s_lock, flags);
                         ipath_ud_loopback(qp, wqe);
                         spin_lock_irqsave(&qp->s_lock, flags);
@@ -323,6 +326,7 @@ int ipath_make_ud_req(struct ipath_qp *qp)
                 }
         }
 
+        qp->s_cur = next_cur;
         extra_bytes = -wqe->length & 3;
         nwords = (wqe->length + extra_bytes) >> 2;
 
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index f51201b17bfd..7e9e218738fa 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -156,14 +156,8 @@ static int ipoib_stop(struct net_device *dev)
 
         netif_stop_queue(dev);
 
-        /*
-         * Now flush workqueue to make sure a scheduled task doesn't
-         * bring our internal state back up.
-         */
-        flush_workqueue(ipoib_workqueue);
-
-        ipoib_ib_dev_down(dev, 1);
-        ipoib_ib_dev_stop(dev, 1);
+        ipoib_ib_dev_down(dev, 0);
+        ipoib_ib_dev_stop(dev, 0);
 
         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
                 struct ipoib_dev_priv *cpriv;
@@ -1314,7 +1308,7 @@ sysfs_failed:
 
 register_failed:
         ib_unregister_event_handler(&priv->event_handler);
-        flush_scheduled_work();
+        flush_workqueue(ipoib_workqueue);
 
 event_failed:
         ipoib_dev_cleanup(priv->dev);
@@ -1373,7 +1367,12 @@ static void ipoib_remove_one(struct ib_device *device)
 
         list_for_each_entry_safe(priv, tmp, dev_list, list) {
                 ib_unregister_event_handler(&priv->event_handler);
-                flush_scheduled_work();
+
+                rtnl_lock();
+                dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
+                rtnl_unlock();
+
+                flush_workqueue(ipoib_workqueue);
 
                 unregister_netdev(priv->dev);
                 ipoib_dev_cleanup(priv->dev);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index 8950e9546f4e..ac33c8f3ea85 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -392,8 +392,16 @@ static int ipoib_mcast_join_complete(int status,
                                            &priv->mcast_task, 0);
                 mutex_unlock(&mcast_mutex);
 
-                if (mcast == priv->broadcast)
+                if (mcast == priv->broadcast) {
+                        /*
+                         * Take RTNL lock here to avoid racing with
+                         * ipoib_stop() and turning the carrier back
+                         * on while a device is being removed.
+                         */
+                        rtnl_lock();
                         netif_carrier_on(dev);
+                        rtnl_unlock();
+                }
 
                 return 0;
         }