cciss: factor out cciss_find_cfg_addrs.

Rationale for this is that I will also need to use this code
in fixing kdump host reset code prior to having the hba structure.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 23 insertions, 12 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 17e420c13b36..3cd8397f82bd 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4064,29 +4064,40 @@ static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
         return -ENODEV;
 }
 
+static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
+        void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
+        u64 *cfg_offset)
+{
+        *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
+        *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
+        *cfg_base_addr &= (u32) 0x0000ffff;
+        *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
+        if (*cfg_base_addr_index == -1) {
+                dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
+                        "*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
+                return -ENODEV;
+        }
+        return 0;
+}
+
 static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
 {
         u64 cfg_offset;
         u32 cfg_base_addr;
         u64 cfg_base_addr_index;
         u32 trans_offset;
+        int rc;
 
-        /* get the address index number */
-        cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
-        cfg_base_addr &= (u32) 0x0000ffff;
-        cfg_base_addr_index = find_PCI_BAR_index(h->pdev, cfg_base_addr);
-        if (cfg_base_addr_index == -1) {
-                dev_warn(&h->pdev->dev, "cannot find cfg_base_addr_index\n");
-                return -ENODEV;
-        }
-        cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
+        rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
+                &cfg_base_addr_index, &cfg_offset);
+        if (rc)
+                return rc;
         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
-                               cfg_base_addr_index) + cfg_offset,
-                                sizeof(h->cfgtable));
+                cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable));
         if (!h->cfgtable)
                 return -ENOMEM;
         /* Find performant mode table. */
-        trans_offset = readl(&(h->cfgtable->TransMethodOffset));
+        trans_offset = readl(&h->cfgtable->TransMethodOffset);
         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
                                 cfg_base_addr_index)+cfg_offset+trans_offset,
                                 sizeof(*h->transtable));