[SCSI] gdth: PCI probe cleanups, prep for PCI hotplug API conversion

- Reduce uses of gdth_pci_str::pdev, preferring a local variable
  (or function arg) 'pdev' instead.

- Reduce uses of gdth_pcistr array, preferring local variable
  (or function arg) 'pcistr' instead.

- Eliminate lone use of gdth_pci_str::irq, using equivalent
  pdev->irq instead

- Eliminate assign-only gdth_pci_str::io_mm

Note:  If the indentation seems weird, that's because a line was
converted from spaces to tabs, when it was modified.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 28 insertions, 33 deletions

diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 0b2080d33575..12be6729898a 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -649,7 +649,6 @@ static void __init gdth_search_dev(gdth_pci_str *pcistr, ushort *cnt,
 
         /* GDT PCI controller found, resources are already in pdev */
         pcistr[*cnt].pdev = pdev;
-        pcistr[*cnt].irq = pdev->irq;
         base0 = pci_resource_flags(pdev, 0);
         base1 = pci_resource_flags(pdev, 1);
         base2 = pci_resource_flags(pdev, 2);
@@ -664,7 +663,6 @@ static void __init gdth_search_dev(gdth_pci_str *pcistr, ushort *cnt,
                 !(base1 & IORESOURCE_IO)) 
                 continue;
             pcistr[*cnt].dpmem = pci_resource_start(pdev, 2);
-            pcistr[*cnt].io_mm = pci_resource_start(pdev, 0);
             pcistr[*cnt].io    = pci_resource_start(pdev, 1);
         }
         TRACE2(("Controller found at %d/%d, irq %d, dpmem 0x%lx\n",
@@ -909,7 +907,8 @@ static int __init gdth_init_isa(ulong32 bios_adr,gdth_ha_str *ha)
 #endif /* CONFIG_ISA */
 
 #ifdef CONFIG_PCI
-static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
+static int __init gdth_init_pci(struct pci_dev *pdev, gdth_pci_str *pcistr,
+                                gdth_ha_str *ha)
 {
     register gdt6_dpram_str __iomem *dp6_ptr;
     register gdt6c_dpram_str __iomem *dp6c_ptr;
@@ -921,14 +920,14 @@ static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
 
     TRACE(("gdth_init_pci()\n"));
 
-    if (pcistr->pdev->vendor == PCI_VENDOR_ID_INTEL)
+    if (pdev->vendor == PCI_VENDOR_ID_INTEL)
         ha->oem_id = OEM_ID_INTEL;
     else
         ha->oem_id = OEM_ID_ICP;
-    ha->brd_phys = (pcistr->pdev->bus->number << 8) | (pcistr->pdev->devfn & 0xf8);
-    ha->stype = (ulong32)pcistr->pdev->device;
-    ha->irq = pcistr->irq;
-    ha->pdev = pcistr->pdev;
+    ha->brd_phys = (pdev->bus->number << 8) | (pdev->devfn & 0xf8);
+    ha->stype = (ulong32)pdev->device;
+    ha->irq = pdev->irq;
+    ha->pdev = pdev;
     
     if (ha->pdev->device <= PCI_DEVICE_ID_VORTEX_GDT6000B) {  /* GDT6000/B */
         TRACE2(("init_pci() dpmem %lx irq %d\n",pcistr->dpmem,ha->irq));
@@ -956,8 +955,7 @@ static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
                     continue;
                 }
                 iounmap(ha->brd);
-                pci_write_config_dword(pcistr->pdev, 
-                                       PCI_BASE_ADDRESS_0, i);
+                pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, i);
                 ha->brd = ioremap(i, sizeof(gdt6_dpram_str)); 
                 if (ha->brd == NULL) {
                     printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
@@ -1066,8 +1064,7 @@ static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
                     continue;
                 }
                 iounmap(ha->brd);
-                pci_write_config_dword(pcistr->pdev, 
-                                       PCI_BASE_ADDRESS_2, i);
+                pci_write_config_dword(pdev, PCI_BASE_ADDRESS_2, i);
                 ha->brd = ioremap(i, sizeof(gdt6c_dpram_str)); 
                 if (ha->brd == NULL) {
                     printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
@@ -1159,16 +1156,16 @@ static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
         }
 
         /* manipulate config. space to enable DPMEM, start RP controller */
-        pci_read_config_word(pcistr->pdev, PCI_COMMAND, &command);
+        pci_read_config_word(pdev, PCI_COMMAND, &command);
         command |= 6;
-        pci_write_config_word(pcistr->pdev, PCI_COMMAND, command);
-        if (pci_resource_start(pcistr->pdev, 8) == 1UL)
-            pci_resource_start(pcistr->pdev, 8) = 0UL;
+        pci_write_config_word(pdev, PCI_COMMAND, command);
+        if (pci_resource_start(pdev, 8) == 1UL)
+            pci_resource_start(pdev, 8) = 0UL;
         i = 0xFEFF0001UL;
-        pci_write_config_dword(pcistr->pdev, PCI_ROM_ADDRESS, i);
+        pci_write_config_dword(pdev, PCI_ROM_ADDRESS, i);
         gdth_delay(1);
-        pci_write_config_dword(pcistr->pdev, PCI_ROM_ADDRESS,
-                               pci_resource_start(pcistr->pdev, 8));
+        pci_write_config_dword(pdev, PCI_ROM_ADDRESS,
+                               pci_resource_start(pdev, 8));
         
         dp6m_ptr = ha->brd;
 
@@ -1195,8 +1192,7 @@ static int __init gdth_init_pci(gdth_pci_str *pcistr,gdth_ha_str *ha)
                     continue;
                 }
                 iounmap(ha->brd);
-                pci_write_config_dword(pcistr->pdev, 
-                                       PCI_BASE_ADDRESS_0, i);
+                pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, i);
                 ha->brd = ioremap(i, sizeof(gdt6m_dpram_str)); 
                 if (ha->brd == NULL) {
                     printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
@@ -4955,12 +4951,13 @@ static int __init gdth_eisa_probe_one(ushort eisa_slot)
 #endif /* CONFIG_EISA */
 
 #ifdef CONFIG_PCI
-static int __init gdth_pci_probe_one(gdth_pci_str *pcistr, int ctr)
+static int __init gdth_pci_probe_one(gdth_pci_str *pcistr)
 {
         struct Scsi_Host *shp;
         gdth_ha_str *ha;
         dma_addr_t scratch_dma_handle = 0;
         int error, i;
+        struct pci_dev *pdev = pcistr->pdev;
 
         shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
         if (!shp)
@@ -4968,13 +4965,13 @@ static int __init gdth_pci_probe_one(gdth_pci_str *pcistr, int ctr)
         ha = shost_priv(shp);
 
         error = -ENODEV;
-        if (!gdth_init_pci(&pcistr[ctr],ha))
+        if (!gdth_init_pci(pdev, pcistr, ha))
                 goto out_host_put;
 
         /* controller found and initialized */
         printk("Configuring GDT-PCI HA at %d/%d IRQ %u\n",
-                pcistr[ctr].pdev->bus->number,
-                PCI_SLOT(pcistr[ctr].pdev->devfn),
+                pdev->bus->number,
+                PCI_SLOT(pdev->devfn),
                 ha->irq);
 
         error = request_irq(ha->irq, gdth_interrupt,
@@ -5019,7 +5016,7 @@ static int __init gdth_pci_probe_one(gdth_pci_str *pcistr, int ctr)
 
         ha->scratch_busy = FALSE;
         ha->req_first = NULL;
-        ha->tid_cnt = pcistr[ctr].pdev->device >= 0x200 ? MAXID : MAX_HDRIVES;
+        ha->tid_cnt = pdev->device >= 0x200 ? MAXID : MAX_HDRIVES;
         if (max_ids > 0 && max_ids < ha->tid_cnt)
                 ha->tid_cnt = max_ids;
         for (i = 0; i < GDTH_MAXCMDS; ++i)
@@ -5039,16 +5036,16 @@ static int __init gdth_pci_probe_one(gdth_pci_str *pcistr, int ctr)
         /* 64-bit DMA only supported from FW >= x.43 */
         if (!(ha->cache_feat & ha->raw_feat & ha->screen_feat & GDT_64BIT) ||
             !ha->dma64_support) {
-                if (pci_set_dma_mask(pcistr[ctr].pdev, DMA_32BIT_MASK)) {
+                if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
                         printk(KERN_WARNING "GDT-PCI %d: "
                                 "Unable to set 32-bit DMA\n", ha->hanum);
                                 goto out_free_coal_stat;
                 }
         } else {
                 shp->max_cmd_len = 16;
-                if (!pci_set_dma_mask(pcistr[ctr].pdev, DMA_64BIT_MASK)) {
+                if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
                         printk("GDT-PCI %d: 64-bit DMA enabled\n", ha->hanum);
-                } else if (pci_set_dma_mask(pcistr[ctr].pdev, DMA_32BIT_MASK)) {
+                } else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
                         printk(KERN_WARNING "GDT-PCI %d: "
                                 "Unable to set 64/32-bit DMA\n", ha->hanum);
                         goto out_free_coal_stat;
@@ -5062,7 +5059,7 @@ static int __init gdth_pci_probe_one(gdth_pci_str *pcistr, int ctr)
         spin_lock_init(&ha->smp_lock);
         gdth_enable_int(ha);
 
-        error = scsi_add_host(shp, &pcistr[ctr].pdev->dev);
+        error = scsi_add_host(shp, &pdev->dev);
         if (error)
                 goto out_free_coal_stat;
         list_add_tail(&ha->list, &gdth_instances);
@@ -5193,7 +5190,7 @@ static int __init gdth_init(void)
                 printk("GDT-HA: Found %d PCI Storage RAID Controllers\n", cnt);
                 gdth_sort_pci(pcistr,cnt);
                 for (ctr = 0; ctr < cnt; ++ctr)
-                        gdth_pci_probe_one(pcistr, ctr);
+                        gdth_pci_probe_one(&pcistr[ctr]);
         }
 #endif /* CONFIG_PCI */
 
diff --git a/drivers/scsi/gdth.h b/drivers/scsi/gdth.h
index 26e4e92515e0..ca92476727cf 100644
--- a/drivers/scsi/gdth.h
+++ b/drivers/scsi/gdth.h
@@ -839,8 +839,6 @@ typedef struct {
     struct pci_dev      *pdev;
     ulong               dpmem;                  /* DPRAM address */
     ulong               io;                     /* IO address */
-    ulong               io_mm;                  /* IO address mem. mapped */
-    unchar              irq;                    /* IRQ */
 } gdth_pci_str;