netxen: handle pci bar 0 mapping failure

PCI bar 0 is used for memory mapped register access.
If ioremap fails (returns NULL), register access results
in crash.

Use pci_ioremap_bar() instead of ioremap(), the latter
fails on on 32 bit powerpc where pci resource address is
> 32 bits.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index f42581157f4e..13087782ac40 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -588,7 +588,12 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
                 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
 
-                mem_ptr0 = ioremap(mem_base, mem_len);
+                mem_ptr0 = pci_ioremap_bar(pdev, 0);
+                if (mem_ptr0 == NULL) {
+                        dev_err(&pdev->dev, "failed to map PCI bar 0\n");
+                        return -EIO;
+                }
+
                 pci_len0 = mem_len;
                 first_page_group_start = 0;
                 first_page_group_end   = 0;