Subject: IB/mthca: FMR ioremap fix
From: Michael S. Tsirkin <mst@mellanox.co.il>

Addresses for ioremap must be calculated off of pci_resource_start;
we can't directly use the bus address as seen by the HCA.  Fix the
code that remaps device memory for FMR access.

Based on patch by Klaus Smolin.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

Index: linus-2.6/drivers/infiniband/hw/mthca/mthca_mr.c
===================================================================
--- linus-2.6.orig/drivers/infiniband/hw/mthca/mthca_mr.c
+++ linus-2.6/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -752,6 +752,7 @@ void mthca_arbel_fmr_unmap(struct mthca_
 
 int __devinit mthca_init_mr_table(struct mthca_dev *dev)
 {
+	unsigned long addr;
 	int err, i;
 
 	err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
@@ -784,9 +785,12 @@ int __devinit mthca_init_mr_table(struct
 			goto err_fmr_mpt;
 		}
 
+		addr = pci_resource_start(dev->pdev, 4) +
+			((pci_resource_len(dev->pdev, 4) - 1) &
+			 dev->mr_table.mpt_base);
+
 		dev->mr_table.tavor_fmr.mpt_base =
-		       	ioremap(dev->mr_table.mpt_base,
-				(1 << i) * sizeof (struct mthca_mpt_entry));
+			ioremap(addr, (1 << i) * sizeof(struct mthca_mpt_entry));
 
 		if (!dev->mr_table.tavor_fmr.mpt_base) {
 			mthca_warn(dev, "MPT ioremap for FMR failed.\n");
@@ -794,9 +798,12 @@ int __devinit mthca_init_mr_table(struct
 			goto err_fmr_mpt;
 		}
 
+		addr = pci_resource_start(dev->pdev, 4) +
+			((pci_resource_len(dev->pdev, 4) - 1) &
+			 dev->mr_table.mtt_base);
+
 		dev->mr_table.tavor_fmr.mtt_base =
-			ioremap(dev->mr_table.mtt_base,
-				(1 << i) * MTHCA_MTT_SEG_SIZE);
+			ioremap(addr, (1 << i) * MTHCA_MTT_SEG_SIZE);
 		if (!dev->mr_table.tavor_fmr.mtt_base) {
 			mthca_warn(dev, "MTT ioremap for FMR failed.\n");
 			err = -ENOMEM;