IB/mthca: FMR ioremap fix

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>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c
index 25e1c1db9a40..a486dec1707e 100644
--- a/drivers/infiniband/hw/mthca/mthca_mr.c
+++ b/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -761,6 +761,7 @@ void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
 
 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,
@@ -796,9 +797,12 @@ int __devinit mthca_init_mr_table(struct mthca_dev *dev)
                         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");
@@ -806,9 +810,12 @@ int __devinit mthca_init_mr_table(struct mthca_dev *dev)
                         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;