netxen: added sanity check for pci map
Amit Kumar Salecha [Fri, 26 Mar 2010 00:30:09 +0000 (00:30 +0000)]
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>

Return value of ioremap is not checked, NULL check added.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/netxen/netxen_nic_main.c

index 9a7a0f3..01808b2 100644 (file)
@@ -604,16 +604,14 @@ netxen_cleanup_pci_map(struct netxen_adapter *adapter)
 static int
 netxen_setup_pci_map(struct netxen_adapter *adapter)
 {
-       void __iomem *mem_ptr0 = NULL;
-       void __iomem *mem_ptr1 = NULL;
-       void __iomem *mem_ptr2 = NULL;
        void __iomem *db_ptr = NULL;
 
        resource_size_t mem_base, db_base;
-       unsigned long mem_len, db_len = 0, pci_len0 = 0;
+       unsigned long mem_len, db_len = 0;
 
        struct pci_dev *pdev = adapter->pdev;
        int pci_func = adapter->ahw.pci_func;
+       struct netxen_hardware_context *ahw = &adapter->ahw;
 
        int err = 0;
 
@@ -630,24 +628,40 @@ netxen_setup_pci_map(struct netxen_adapter *adapter)
 
        /* 128 Meg of memory */
        if (mem_len == NETXEN_PCI_128MB_SIZE) {
-               mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
-               mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
+
+               ahw->pci_base0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
+               ahw->pci_base1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
                                SECOND_PAGE_GROUP_SIZE);
-               mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
+               ahw->pci_base2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
                                THIRD_PAGE_GROUP_SIZE);
-               pci_len0 = FIRST_PAGE_GROUP_SIZE;
+               if (ahw->pci_base0 == NULL || ahw->pci_base1 == NULL ||
+                                               ahw->pci_base2 == NULL) {
+                       dev_err(&pdev->dev, "failed to map PCI bar 0\n");
+                       err = -EIO;
+                       goto err_out;
+               }
+
+               ahw->pci_len0 = FIRST_PAGE_GROUP_SIZE;
+
        } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
-               mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
-               mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
+
+               ahw->pci_base1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
+               ahw->pci_base2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
                        SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
+               if (ahw->pci_base1 == NULL || ahw->pci_base2 == NULL) {
+                       dev_err(&pdev->dev, "failed to map PCI bar 0\n");
+                       err = -EIO;
+                       goto err_out;
+               }
+
        } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
 
-               mem_ptr0 = pci_ioremap_bar(pdev, 0);
-               if (mem_ptr0 == NULL) {
+               ahw->pci_base0 = pci_ioremap_bar(pdev, 0);
+               if (ahw->pci_base0 == NULL) {
                        dev_err(&pdev->dev, "failed to map PCI bar 0\n");
                        return -EIO;
                }
-               pci_len0 = mem_len;
+               ahw->pci_len0 = mem_len;
        } else {
                return -EIO;
        }
@@ -656,11 +670,6 @@ netxen_setup_pci_map(struct netxen_adapter *adapter)
 
        dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
 
-       adapter->ahw.pci_base0 = mem_ptr0;
-       adapter->ahw.pci_len0 = pci_len0;
-       adapter->ahw.pci_base1 = mem_ptr1;
-       adapter->ahw.pci_base2 = mem_ptr2;
-
        if (NX_IS_REVISION_P3P(adapter->ahw.revision_id)) {
                adapter->ahw.ocm_win_crb = netxen_get_ioaddr(adapter,
                        NETXEN_PCIX_PS_REG(PCIX_OCM_WINDOW_REG(pci_func)));