[SCSI] aic79xx: fix MMIO for PPC 44x platforms

The driver stores the PCI resource address into 'u_long' variable before
calling ioremap_nocache() on it. This warrants kernel oops when the registers
are accessed on PPC 44x platforms which (being 32-bit) have PCI memory space
mapped beyond 4 GB.

The arch/ppc/ kernel has a fixup in ioremap() that helps create an illusion
that the PCI memory resources are mapped below 4 GB, but arch/powerpc/ code
got rid of this trick, having instead CONFIG_RESOURCES_64BIT enabled.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 16 insertions, 15 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.h b/drivers/scsi/aic7xxx/aic79xx_osm.h
index b252803e05f..08dd18229b4 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.h
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.h
@@ -360,7 +360,7 @@ struct ahd_platform_data {
 #define AHD_LINUX_NOIRQ ((uint32_t)~0)
         uint32_t                 irq;           /* IRQ for this adapter */
         uint32_t                 bios_address;
-        uint32_t                 mem_busaddr;   /* Mem Base Addr */
+        resource_size_t          mem_busaddr;   /* Mem Base Addr */
 };
 
 /************************** OS Utility Wrappers *******************************/
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
index dfaaae5e73a..9e0d7bdc889 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
@@ -249,8 +249,8 @@ ahd_linux_pci_exit(void)
 }
 
 static int
-ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
-                                 u_long *base2)
+ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
+                                 resource_size_t *base2)
 {
         *base = pci_resource_start(ahd->dev_softc, 0);
         /*
@@ -272,11 +272,11 @@ ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
 
 static int
 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
-                                 u_long *bus_addr,
+                                 resource_size_t *bus_addr,
                                  uint8_t __iomem **maddr)
 {
-        u_long  start;
-        u_long  base_page;
+        resource_size_t start;
+        resource_size_t base_page;
         u_long  base_offset;
         int     error = 0;
 
@@ -310,7 +310,7 @@ int
 ahd_pci_map_registers(struct ahd_softc *ahd)
 {
         uint32_t command;
-        u_long   base;
+        resource_size_t base;
         uint8_t __iomem *maddr;
         int      error;
 
@@ -346,31 +346,32 @@ ahd_pci_map_registers(struct ahd_softc *ahd)
                 } else
                         command |= PCIM_CMD_MEMEN;
         } else if (bootverbose) {
-                printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
+                printf("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
                        "unavailable. Cannot memory map device.\n",
                        ahd_get_pci_bus(ahd->dev_softc),
                        ahd_get_pci_slot(ahd->dev_softc),
                        ahd_get_pci_function(ahd->dev_softc),
-                       base);
+                       (unsigned long long)base);
         }
 
         if (maddr == NULL) {
-                u_long   base2;
+                resource_size_t base2;
 
                 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
                 if (error == 0) {
                         ahd->tags[0] = BUS_SPACE_PIO;
                         ahd->tags[1] = BUS_SPACE_PIO;
-                        ahd->bshs[0].ioport = base;
-                        ahd->bshs[1].ioport = base2;
+                        ahd->bshs[0].ioport = (u_long)base;
+                        ahd->bshs[1].ioport = (u_long)base2;
                         command |= PCIM_CMD_PORTEN;
                 } else {
-                        printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
-                               "unavailable. Cannot map device.\n",
+                        printf("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
+                               "0x%llx unavailable. Cannot map device.\n",
                                ahd_get_pci_bus(ahd->dev_softc),
                                ahd_get_pci_slot(ahd->dev_softc),
                                ahd_get_pci_function(ahd->dev_softc),
-                               base, base2);
+                               (unsigned long long)base,
+                               (unsigned long long)base2);
                 }
         }
         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);